NXT-12459: Replace Travis CI with GitHub Actions

.github/workflows/ci-branch.yml

@@ -0,0 +1,21 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - develop
+      - master
+  pull_request:
+    types: [opened, synchronize, reopened]
+  workflow_dispatch:
+
+concurrency:
+  group: ci-branch-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  branch:
+    uses: ./.github/workflows/ci-reusable.yml
+    with:
+      checkout-ref: ${{ github.event.pull_request.head.sha || github.sha }}
+    secrets: inherit

.github/workflows/ci-pull-request.yml

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+name: CI
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+concurrency:
+  group: ci-pr-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  pull-request:
+    uses: ./.github/workflows/ci-reusable.yml
+    with:
+      checkout-ref: ''
+    secrets: inherit

.github/workflows/ci-reusable.yml

@@ -0,0 +1,78 @@
+name: CI Pipeline
+
+on:
+  workflow_call:
+    inputs:
+      checkout-ref:
+        description: 'Git ref to checkout (empty for default merge commit)'
+        type: string
+        required: false
+        default: ''
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: ['lts/*', 'node']
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.checkout-ref || github.ref }}
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Clone and setup Enact CLI
+        run: |
+          git clone --branch=develop --depth 1 https://github.com/enactjs/cli ../cli
+          pushd ../cli
+          npm install
+          npm link
+          popd
+
+      - name: Install project dependencies
+        run: npm install
+
+      - name: Run ESLint
+        run: npm run lint
+
+      - name: Starting agate/all-samples build
+        run: |
+          cd agate/all-samples
+          npm install
+          npm run pack
+          cd ../../
+
+      - name: Starting moonstone/all-samples build
+        run: |
+          cd moonstone/all-samples
+          npm install
+          npm run pack
+          cd ../../
+
+      - name: Starting sandstone/all-samples build
+        run: |
+          cd sandstone/all-samples
+          npm install
+          npm run pack
+          cd ../../
+
+      - name: Starting ui/all-samples build
+        run: |
+          cd ui/all-samples
+          npm install
+          npm run pack
+          cd ../../
+
+      - name: Starting my-theme-app build
+        run: |
+          cd my-theme-app
+          npm install
+          npm run pack
+          cd ../../