Enhance CI workflow with OS matrix and dependencies

Added OS matrix strategy for CI build and improved dependency installation steps for Linux and macOS.

Author: aditya-raj-arora

.github/workflows/c-cpp.yml

@@ -0,0 +1,48 @@
+name: C/C++ CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies (Linux)
+      if: runner.os == 'Linux'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y build-essential
+
+    - name: Install dependencies (macOS)
+      if: runner.os == 'macOS'
+      run: |
+        brew install make
+
+    - name: Build with Make
+      run: make
+
+    - name: Test executable exists
+      run: |
+        if [ "${{ runner.os }}" == "Windows" ]; then
+          if [ ! -f "mas.exe" ]; then
+            echo "Build failed: mas.exe not found"
+            exit 1
+          fi
+        else
+          if [ ! -f "mas.exe" ]; then
+            echo "Build failed: mas.exe not found"
+            exit 1
+          fi
+        fi
+
+    - name: Clean build artifacts
+      run: make clean