chore(build): add Gitea Actions release pipeline

Builds Linux x64 and Windows x64 binaries on tag pushes (v*) and
publishes them as assets on a Gitea release via the REST API.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -0,0 +1,77 @@
+name: release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build:
+    name: Build (${{ matrix.goos }}/${{ matrix.goarch }})
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - goos: linux
+            goarch: amd64
+            suffix: -linux-amd64
+          - goos: windows
+            goarch: amd64
+            suffix: .exe
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Build
+        env:
+          GOOS: ${{ matrix.goos }}
+          GOARCH: ${{ matrix.goarch }}
+          CGO_ENABLED: "0"
+        run: |
+          go build -trimpath -ldflags="-s -w" \
+            -o glint-${{ github.ref_name }}${{ matrix.suffix }} \
+            ./cmd/glint/...
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: binary-${{ matrix.goos }}-${{ matrix.goarch }}
+          path: glint-${{ github.ref_name }}${{ matrix.suffix }}
+          retention-days: 7
+
+  release:
+    name: Publish release
+    needs: build
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          pattern: binary-*
+          merge-multiple: true
+
+      - name: Create release and upload assets
+        env:
+          TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAG: ${{ github.ref_name }}
+          API_URL: ${{ github.api_url }}
+          REPO: ${{ github.repository }}
+        run: |
+          release_id=$(curl -sf -X POST \
+            -H "Authorization: token $TOKEN" \
+            -H "Content-Type: application/json" \
+            "$API_URL/repos/$REPO/releases" \
+            -d "{\"tag_name\":\"$TAG\",\"name\":\"$TAG\",\"draft\":false,\"prerelease\":false}" \
+            | jq -r .id)
+
+          for file in glint-*; do
+            curl -sf -X POST \
+              -H "Authorization: token $TOKEN" \
+              -H "Content-Type: application/octet-stream" \
+              "$API_URL/repos/$REPO/releases/$release_id/assets?name=$(basename "$file")" \
+              --data-binary "@$file"
+            echo "uploaded: $file"
+          done