ci: add Gitea workflows and goreleaser config

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -0,0 +1,24 @@
+name: release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7.0.1
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-go@v7.0.0
+        with:
+          go-version-file: go.mod
+      - uses: goreleaser/goreleaser-action@v7.3.0
+        with:
+          distribution: goreleaser
+          version: v2.19.0
+          args: release --clean
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}