added github actions build workflow

.github/workflows/build-test.yml

@@ -0,0 +1,31 @@
+name: Build and Test
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        arch: [arm64]  # Specify the desired architectures here
+
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v3
+
+    - name: Build libpksav
+      run: |
+        cd libpksav/
+        cmake .
+        make 
+
+    - name: Build Project
+      run: |
+        make all
+
+    - name: Clean Up
+      run: |
+        make clean