Add basic CI

.github/actions/package-install/action.yaml

@@ -0,0 +1,25 @@
+name: 📥 Install Package
+description: Install Node.js, NPM, and the package's NPM dependencies, and cache it.
+
+runs:
+  using: composite
+  steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Install Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: "latest"
+        cache: "npm"
+
+    - name: Output versions
+      shell: bash
+      run: |
+        echo Node and NPM versions
+        node --version
+        npm --version
+
+    - name: Install NPM dependencies
+      shell: bash
+      run: npm install

.github/workflows/_build-lint.yaml

@@ -0,0 +1,17 @@
+name: ⚒️ Build - 🧹 Lint
+
+on: workflow_call
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: 📥 Install
+        uses: ./.github/actions/package-install
+
+      - name: Build
+        run: npm run build
+
+      - name: Lint
+        run: npm run lint

.github/workflows/_docs.yaml

@@ -0,0 +1,14 @@
+name: 📙 Documentation
+
+on: workflow_call
+
+jobs:
+  docs:
+    name: Documentation
+    runs-on: ubuntu-latest
+    steps:
+      - name: 📥 Install
+        uses: ./.github/actions/package-install
+
+      - name: Biuld documentation
+        run: npm run doc

.github/workflows/_tests.yaml

@@ -0,0 +1,14 @@
+name: 📝 Tests
+
+on: workflow_call
+
+jobs:
+  tests:
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: 📥 Install
+        uses: ./.github/actions/package-install
+
+      - name: Run tests
+        run: npm test

.github/workflows/ci.yaml

@@ -0,0 +1,16 @@
+name: ⚙️ CI
+
+on: push
+
+jobs:
+  call-build-lint:
+    name: ⚒️ Build - 🧹 Lint
+    uses: ./.github/workflows/_build-lint.yaml
+
+  call-tests:
+    name: 📝 Tests
+    uses: ./.github/workflows/_tests.yaml
+
+  call-docs:
+    name: 📙 Documentation
+    uses: ./.github/workflows/_docs.yaml

.npmignore

@@ -1,4 +1,5 @@
 # config
+.github/
 .clang-format
 .editorconfig
 .eslintrc.json