add build library workflow

.github/workflows/build_libraries.yml

@@ -0,0 +1,55 @@
+name: Build Host C++ / Python Libraries
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+  release:
+    types: [published]
+  workflow_dispatch:
+
+jobs:
+  build_linux:
+
+    runs-on: ubuntu-latest
+    continue-on-error: false
+
+    steps:
+    - name: Checkout repo
+      uses: actions/checkout@v4
+      with:
+        submodules: 'recursive'
+        fetch-depth: 0
+
+    - name: Build libraries
+      working-directory: lib/
+      run: |
+        ./build.sh
+
+  build_macos:
+
+    runs-on: macos-latest
+    continue-on-error: false
+
+    steps:
+    - name: Setup XCode
+      uses: maxim-lobanov/setup-xcode@v1
+      with:
+        xcode-version: latest-stable
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.12'
+
+    - name: Checkout repo
+      uses: actions/checkout@v4
+      with:
+        submodules: 'recursive'
+        fetch-depth: 0
+
+    - name: Build libraries
+      working-directory: lib/
+      run: |
+        ./build.sh