feat: add code for Kubernetes informer-based watcher of Casbin (#3)

Author: Copilot

.github/workflows/ci.yml

@@ -0,0 +1,66 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        go-version: ['1.23.0']
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      - name: Test
+        run: go test -v -covermode=atomic -coverprofile=coverage.out ./...
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          file: ./coverage.out
+          flags: unittests
+          name: codecov-umbrella
+
+  semantic-release:
+    needs: [test]
+    if: github.repository == 'casbin/casbin-informer-watcher' && github.event_name == 'push' && github.ref == 'refs/heads/master'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      issues: write
+      pull-requests: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 'lts/*'
+
+      - name: Install semantic-release
+        run: |
+          npm install -g semantic-release @semantic-release/git @semantic-release/changelog @semantic-release/github
+
+      - name: Run semantic-release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: semantic-release

.releaserc.json

@@ -0,0 +1,22 @@
+{
+  "branches": [
+    "+([0-9])?(.{+([0-9]),x}).x",
+    "master",
+    {
+      "name": "beta",
+      "prerelease": true
+    }
+  ],
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    "@semantic-release/changelog",
+    [
+      "@semantic-release/git",
+      {
+        "assets": ["CHANGELOG.md"]
+      }
+    ],
+    "@semantic-release/github"
+  ]
+}