Add baseline GitHub Actions checks

.github/workflows/lint-php.yml

@@ -0,0 +1,35 @@
+name: PHP Lint
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    name: PHP ${{ matrix.php }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php: ['7.4', '8.0', '8.1', '8.2', '8.3']
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          tools: php-parallel-lint
+          coverage: none
+
+      - name: Lint PHP files
+        run: parallel-lint .

.github/workflows/wpcs.yml

@@ -0,0 +1,29 @@
+name: WordPress Coding Standards
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  phpcs:
+    name: WPCS
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: WPCS check
+        uses: 10up/wpcs-action@stable
+        with:
+          enable_warnings: true
+          standard: WordPress
+          only_changed_lines: true