ci: configure release-please and semantic pull requests

- Add `release-please-config.json` and `.release-please-manifest.json` for manifest-based release management.
- Add `.github/workflows/semantic-pull-request.yml` to enforce conventional commit titles.
- Update `.github/workflows/release.yml` to remove inline configuration and rely on config files.

Author: google-labs-jules[bot]

.github/workflows/release.yml

@@ -14,5 +14,3 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: googleapis/release-please-action@v4
-        with:
-          release-type: go

.github/workflows/semantic-pull-request.yml

@@ -0,0 +1,34 @@
+name: "Semantic Pull Request"
+
+on:
+  pull_request:
+    types:
+      - opened
+      - edited
+      - synchronize
+
+jobs:
+  main:
+    name: Validate PR title
+    runs-on: ubuntu-latest
+    steps:
+      - uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          # Configure which types are allowed.
+          # Default: https://github.com/commitizen/conventional-commit-types
+          types: |
+            feat
+            fix
+            docs
+            style
+            refactor
+            perf
+            test
+            build
+            ci
+            chore
+            revert
+          # Configure that a scope must always be provided.
+          requireScope: false

.release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+  ".": "0.0.0"
+}

release-please-config.json

@@ -0,0 +1,10 @@
+{
+  "packages": {
+    ".": {
+      "release-type": "go",
+      "package-name": "laravel-go",
+      "include-component-in-tag": false
+    }
+  },
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json"
+}