fix: migrate golangci-lint config to v2 and add package comment

- Add `version: "2"` to .golangci.yml (required by v2)
- Move gofmt/goimports from linters to formatters section
- Remove gosimple (merged into staticcheck in v2)
- Lock lint CI job to golangci-lint v2 instead of latest
- Add package comment to cmd/webhook/main.go (revive.package-comments)

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: archlitchi

.github/workflows/lint.yml

@@ -30,5 +30,5 @@ jobs:
       - name: Run golangci-lint
         uses: golangci/golangci-lint-action@v7
         with:
-          version: latest
+          version: v2
           args: --timeout=3m

.golangci.yml

@@ -1,21 +1,17 @@
+version: "2"
+
 linters:
   enable:
-    - errcheck
-    - gosimple
-    - govet
-    - ineffassign
-    - staticcheck
-    - unused
-    - gofmt
-    - goimports
     - misspell
     - revive
-  disable-all: true
+
+formatters:
+  enable:
+    - gofmt
+    - goimports
 
 run:
   timeout: 3m
-
-issues:
   exclude-dirs:
     - libvgpu
     - vendor

cmd/webhook/main.go

@@ -3,6 +3,7 @@ Copyright The HAMi Authors.
 SPDX-License-Identifier: Apache-2.0
 */
 
+// Package main implements the mutating admission webhook for KAI resource isolator.
 package main
 
 import (