Prepare build workflow in GitHub

.github/workflows/build.yml

@@ -0,0 +1,67 @@
+name: Build Chrome Extension
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18, 20]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+          cache-dependency-path: 'package-lock.json'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint code
+        run: npm run lint
+
+      - name: Run tests
+        run: npm test
+  build:
+    needs: test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        browser: [chrome, firefox]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node v20
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+          cache-dependency-path: 'package-lock.json'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build extension for ${{ matrix.browser }}
+        run: npm run build-${{ matrix.browser }}
+
+      - name: Upload extension zip
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.browser }}-extension
+          path: dist/*
+          if-no-files-found: error

.mocharc.json

@@ -1,4 +1,6 @@
 {
+  "required": ["ts-node/register", "tsconfig-paths/register"],
   "extension": ["ts", "js"],
-  "loader": "ts-node/esm"
+  "loader": "ts-node/esm",
+  "spec": ["./test/setup.ts", "./test/**/*.ts"]
 }