Add GitHub Actions workflow for build and test process

Author: zaknafeyn

.github/workflows/build.yml

@@ -0,0 +1,27 @@
+name: Build and Test
+
+on:
+  push:
+    branches: ['**'] # Triggers on push to any branch
+  pull_request:
+    branches: ['main'] # Also run on PRs to main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'yarn'
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Run build-all
+        run: yarn build-all