Add GitHub Actions CI, restore composer.json, gitignore lock files, fix ANSI escapes

Co-authored-by: dd32 <767313+dd32@users.noreply.github.com>

Author: Copilot

.github/workflows/test.yml

@@ -0,0 +1,45 @@
+name: Test
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    name: Integration tests (wp-env)
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 'lts/*'
+          cache: 'npm'
+
+      - name: Install Node.js dependencies
+        run: npm ci
+
+      # Cache the wp-env working directory (~/.wp-env) so that the WordPress
+      # download and database setup are reused across runs when nothing changes.
+      - name: Cache wp-env
+        uses: actions/cache@v4
+        with:
+          path: ~/.wp-env
+          key: wp-env-${{ hashFiles('package-lock.json', '.wp-env.json') }}
+          restore-keys: |
+            wp-env-
+
+      - name: Start wp-env
+        run: npx wp-env start
+
+      - name: Run tests
+        run: npm test
+
+      - name: Stop wp-env
+        run: npx wp-env stop
+        if: always()

.gitignore

@@ -1,3 +1,5 @@
-vendor/
 node_modules/
+vendor/
 .wp-env/
+composer.lock
+package-lock.json