Add initial implementation of gitea-mcp-forward-auth microservice

- Create build and release workflows for CI/CD
- Implement Dockerfile for multi-stage builds
- Add core authentication logic with token validation
- Include HTTP handler for authorization checks
- Set up Kubernetes deployment and service manifests
- Update README with usage instructions and configuration details

.gitea/workflows/build.yaml

@@ -0,0 +1,28 @@
+name: Build and Test
+
+on:
+  push:
+    branches:
+      - '**'
+  workflow_dispatch:
+
+jobs:
+  verify:
+    runs-on: container-builder
+    container:
+      image: golang:1.24-bookworm
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v4
+
+      - name: Show Go Version
+        run: go version
+
+      - name: Go Vet
+        run: go vet ./...
+
+      - name: Go Test
+        run: go test ./... -v
+
+      - name: Go Build
+        run: go build ./cmd/authproxy