ci: improve release automation workflow

- Add a new GitHub Actions workflow for releases that triggers on any tag push, sets up Go environment, caches dependencies, and runs GoReleaser with Gitea token.
- Create a new GoReleaser configuration file that skips the build process, enables changelog generation with sorting, groups commits into categories for changelog, and excludes certain commit messages from the changelog.
- Define Gitea API and download URLs in the GoReleaser configuration.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

.gitea/workflows/release.yaml

@@ -0,0 +1,50 @@
+name: release-main
+
+on:
+  push:
+    tags:
+      - "*"
+
+env:
+  GOPATH: /go_path
+  GOCACHE: /go_cache
+
+jobs:
+  release-image:
+    runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-20.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # all history for all branches and tags
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "^1"
+      - uses: https://gitea.com/actions/go-hashfiles@v0.0.1
+        id: hash-go
+        with:
+          patterns: |
+            go.mod
+            go.sum
+      - name: cache go
+        id: cache-go
+        uses: actions/cache@v4
+        with:
+          path: |
+            /go_path
+            /go_cache
+          key: go_path-${{ steps.hash-go.outputs.hash }
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v5
+        with:
+          # either 'goreleaser' (default) or 'goreleaser-pro'
+          distribution: goreleaser
+          version: latest
+          args: release --clean
+        env:
+          GITEA_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GORELEASER_FORCE_TOKEN: "gitea"