Added GitHub checks.

.github/workflows/checks.yaml

@@ -0,0 +1,32 @@
+name: Code Checks
+
+on:
+  push:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - run: git fetch origin main --depth=1
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+      - name: RuboCop Linter
+        run: bundle exec rubocop
+
+  spec:
+    runs-on: ubuntu-latest
+    env:
+      COVERAGE: 1
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+      - name: Run tests
+        run: bundle exec rspec

.github/workflows/codeql.yaml

@@ -0,0 +1,36 @@
+name: CodeQL
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  schedule:
+    - cron: '45 13 * * *'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'javascript', 'ruby' ]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          queries: security-extended,security-and-quality
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3