Added github workflows

.github/workflows/bld.yml

@@ -0,0 +1,32 @@
+name: bld-ci
+
+on: [ push, pull_request, workflow_dispatch ]
+
+jobs:
+  build-bld-project:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        java-version: [ 17, 19, 20 ]
+
+    steps:
+      - name: Checkout source repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Set up JDK ${{ matrix.java-version }}
+        uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: ${{ matrix.java-version }}
+
+      - name: Grant execute permission for bld
+        run: chmod +x bld
+
+      - name: Download the dependencies
+        run: ./bld download
+
+      - name: Run tests with bld
+        run: ./bld compile test