add ffi-c-tests github workflow with the validation headers job

Author: ZocoLini

.github/workflows/ffi-c-tests.yml

@@ -0,0 +1,33 @@
+name: FFI C Tests
+
+on:
+  push:
+    branches:
+      - master
+      - 'v**-dev'
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  header-validation:
+    name: Header validation
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Setup Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Install C compiler
+        run: sudo apt-get update && sudo apt-get install -y build-essential
+
+      - name: Run header validation script
+        run: bash ffi-c-tests/validate-headers.sh