Update to use stable Go and add comprehensive CI/CD

- Replace gotip with stable Go in GitHub Actions
- Add automatic GVR inference for Kubernetes types
- Rename API: NewClient (inferred GVR) and NewClientGVR (explicit)
- Add comprehensive test coverage including e2e tests
- Update CI to include linting, unit tests, and e2e tests with kind
- Add .gitignore for common Go development files
- Update README with usage examples and features

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/build.yaml

@@ -3,23 +3,47 @@ name: Build
 on:
   push:
     branches: ['main']
+  pull_request:
   workflow_dispatch:
 
 jobs:
   build:
     name: build
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-go@v2
+    - uses: actions/checkout@v4
+    
+    - uses: actions/setup-go@v5
       with:
-        go-version: '1.17.x'
-    - uses: engineerd/setup-kind@v0.5.0
-    - run: |
-        go install golang.org/dl/gotip@latest
-        gotip download
+        go-version: 'stable'
 
-        gotip build ./
-        gotip run ./
-        gotip run ./
+    - run: go build ./...
+    - run: go vet ./...
+    
+    - run: |
+        if [ "$(gofmt -s -l . | wc -l)" -gt 0 ]; then
+          echo "Code is not formatted. Run 'gofmt -s -w .'"
+          gofmt -s -d .
+          exit 1
+        fi
+    
+    - run: |
+        go mod tidy
+        git diff --exit-code go.mod go.sum
+    
+    - name: Run unit tests
+      run: go test ./... -v -race
+    
+    - uses: chainguard-dev/actions/setup-kind@main
+      with:
+        k8s-version: v1.33.0
+    
+    - run: |
+        kubectl cluster-info
+        kubectl get nodes
+    
+    - name: Run e2e tests
+      run: go test ./... -v -tags=e2e
+    
+    - name: Run example
+      run: go run ./main.go