chore(actions): add release please workflow

.github/workflows/release-please.yml

@@ -0,0 +1,34 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - "master"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+      pull-requests: write
+
+    if: github.ref == 'refs/heads/master'
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: "${{ env.PHP_VERSION }}"
+          extensions: "${{ env.PHP_EXTENSIONS }}"
+          tools: humbug/box
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate --strict
+
+      - uses: google-github-actions/release-please-action@v4
+        id: create_release
+        with:
+          target-branch: master

release-please-config.json

@@ -0,0 +1,13 @@
+{
+    "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+    "release-type": "php",
+    "include-component-in-tag": false,
+    "packages": {
+        ".": {
+            "changelog-path": "CHANGELOG.md",
+            "draft": true,
+            "package-name": "release-please-action",
+            "release-type": "php"
+        }
+    }
+}

release-please-manifest.json

@@ -0,0 +1,3 @@
+{
+    ".": "2.1.0"
+}