refactor: flatten controlplane/ into gateway/ root

Move all controlplane/ contents (cmd, internal, config, vendor, conformance)
directly into gateway/ root. Update all import paths, Makefile, Dockerfile,
CI workflows, and README to reflect the new flat structure.

- go.mod: module path -> github.com/nantian-gw/gateway
- 188 Go files: import paths updated
- Makefile: remove cd controlplane && prefixes
- Dockerfile: simplify COPY paths
- CI workflows: update go-version-file and cache-dependency-path
- .gitignore/.dockerignore: remove controlplane/ prefix
- README: update badge link and directory tree

Author: mahmut-Abi

.dockerignore

@@ -1,7 +1,7 @@
 .git
 target
 dataplane/target
-controlplane/bin
+bin
 tmp
 coverage
 dashboard/.next

.github/workflows/ci.yml

@@ -16,8 +16,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version-file: controlplane/go.mod
-          cache-dependency-path: controlplane/go.sum
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
       - name: Build
         run: cd controlplane && go build ./...
 
@@ -27,8 +27,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version-file: controlplane/go.mod
-          cache-dependency-path: controlplane/go.sum
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
       - name: Test
         run: cd controlplane && go test ./...
 
@@ -38,8 +38,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version-file: controlplane/go.mod
-          cache-dependency-path: controlplane/go.sum
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
       - name: Verify go mod tidy
         run: |
           cd controlplane
@@ -61,7 +61,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version-file: controlplane/go.mod
-          cache-dependency-path: controlplane/go.sum
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
       - name: Run benchmarks
         run: cd controlplane && go test -bench=. -benchtime=1x ./...

.github/workflows/codeql.yml

@@ -7,7 +7,7 @@ name: CodeQL
     paths:
       - ".github/workflows/**"
       - "Makefile"
-      - "controlplane/**"
+      - "**"
       - "proto/**"
       - "tests/conformance-harness/**"
   pull_request:
@@ -16,7 +16,7 @@ name: CodeQL
     paths:
       - ".github/workflows/**"
       - "Makefile"
-      - "controlplane/**"
+      - "**"
       - "proto/**"
       - "tests/conformance-harness/**"
   schedule:
@@ -46,9 +46,9 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version-file: controlplane/go.mod
+          go-version-file: go.mod
           cache-dependency-path: |
-            controlplane/go.sum
+            go.sum
             tests/conformance-harness/go.sum
 
       - name: Install Go build dependencies

.github/workflows/release.yml

@@ -76,8 +76,8 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version-file: controlplane/go.mod
-          cache-dependency-path: controlplane/go.sum
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
 
       - name: Run Go unit tests
         working-directory: controlplane
@@ -100,8 +100,8 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version-file: controlplane/go.mod
-          cache-dependency-path: controlplane/go.sum
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
 
       - name: Install release validation dependencies
         run: |
@@ -198,8 +198,8 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version-file: controlplane/go.mod
-          cache-dependency-path: controlplane/go.sum
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v4
@@ -216,7 +216,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: .
-          file: controlplane/Dockerfile
+          file: Dockerfile
           push: true
           tags: ${{ needs.metadata.outputs.control_image }}
 

.github/workflows/security-scans.yml

@@ -25,8 +25,8 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version-file: controlplane/go.mod
-          cache-dependency-path: controlplane/go.sum
+          go-version-file: go.mod
+          cache-dependency-path: go.sum
 
       - name: Install scanner prerequisites
         run: |

.gitignore

@@ -5,13 +5,12 @@ dist/
 .vscode/
 coverage/
 tmp/
-controlplane/internal/gen/
-!controlplane/internal/gen/
-!controlplane/internal/gen/gateway/
-!controlplane/internal/gen/gateway/control/
-!controlplane/internal/gen/gateway/control/v1/
-!controlplane/internal/gen/gateway/control/v1/*.go
-controlplane/bin/
+internal/gen/
+!internal/gen/
+!internal/gen/gateway/
+!internal/gen/gateway/control/
+!internal/gen/gateway/control/v1/
+!internal/gen/gateway/control/v1/*.go
 .DS_Store
 build_push.sh
 .worktrees/

controlplane/.golangci.yml .golangci.ymlcontrolplane/.golangci.yml renamed to .golangci.yml

@@ -7,14 +7,11 @@ ENV GOPROXY=${GOPROXY}
 
 WORKDIR /src
 
-COPY controlplane/go.mod controlplane/go.sum ./controlplane/
-COPY controlplane/vendor/ ./controlplane/vendor/
-WORKDIR /src/controlplane
+COPY go.mod go.sum ./
+COPY vendor/ ./vendor/
 
-WORKDIR /src
-COPY controlplane/ ./controlplane/
-RUN cd ./controlplane \
-    && CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -mod=vendor -ldflags="-s -w" -trimpath -o /out/nantian-controlplane ./cmd/manager
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -mod=vendor -ldflags="-s -w" -trimpath -o /out/nantian-controlplane ./cmd/manager
 
 FROM ${RUNTIME_IMAGE}
 

controlplane/Dockerfile Dockerfilecontrolplane/Dockerfile renamed to Dockerfile

@@ -3,7 +3,7 @@
 A Kubernetes Gateway API implementation targeting v1.5.1 with 55 declared supported features.
 
 [![License](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](LICENSE)
-[![Go](https://img.shields.io/badge/Go-1.26-00ADD8?logo=go)](controlplane/go.mod)
+[![Go](https://img.shields.io/badge/Go-1.26-00ADD8?logo=go)](go.mod)
 
 ## Overview
 
@@ -116,13 +116,13 @@ Governance files: `LICENSE`, `MAINTAINERS.md`, `GOVERNANCE.md`, `CODE_OF_CONDUCT
 
 ```
 nantian-gw/
-├── controlplane/   Go controller, translator, status, admin, xDS server
-├── proto/          gRPC config discovery protocol (single source of truth)
-├── deploy/         Kubernetes Kustomize base + overlays, observability assets
-├── tests/          Unit tests, Kind smoke, conformance harness
-├── docs/           Developer and user documentation
-├── scripts/        Build, test, and release automation
-└── configs/        Local runtime configs for controlplane and dataplane
+├── cmd/            CLI entry points (manager, gateway-api-support, etc.)
+├── config/         CRD configuration templates
+├── internal/       Core packages: translator, xDS server, controllers, admin API
+├── configs/        Local runtime configs for controlplane and dataplane
+├── deploy/         Kubernetes Kustomize base + overlays, Helm chart, observability assets
+├── conformance/    Gateway API conformance test suite
+├── vendor/         Go vendored dependencies
 ```
 
 ## Project Status