ci: Update Windows build workflow

- Add MSYS2 environment setup
- Configure GCC, SDL2, and PortAudio dependencies
- Set proper shell for Windows builds

Author: ffbsoffa

.github/workflows/c-cpp.yml

@@ -8,15 +8,27 @@ on:
 
 jobs:
   build:
-
     runs-on: windows-latest
+    defaults:
+      run:
+        shell: msys2 {0}
+
     steps:
       - uses: actions/checkout@v4
+      
+      - name: Setup MSYS2
+        uses: msys2/setup-msys2@v2
+        with:
+          msystem: MINGW64
+          update: true
+          install: >-
+            mingw-w64-x86_64-gcc
+            mingw-w64-x86_64-SDL2
+            mingw-w64-x86_64-portaudio
+            make
+            
       - name: Build
         run: |
           cd source
-          pacman -S mingw-w64-x86_64-gcc
-          pacman -S mingw-w64-x86_64-SDL2
-          pacman -S mingw-w64-x86_64-portaudio   
           make clean
           make