fix(ci): Cat-1 — add Raylib Linux deps (X11, OpenGL, Wayland, audio)

Iterative fix: cmake configure failed with "RandR headers not found"
because Raylib's GLFW backend requires X11 + GL development packages.
Added standard Raylib Linux deps per their wiki:
- libasound2-dev (audio)
- libx11-dev libxrandr-dev libxi-dev libxcursor-dev libxinerama-dev
- libxkbcommon-dev libwayland-dev
- libgl1-mesa-dev libglu1-mesa-dev

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/reusable-engine-launcher.yml

@@ -27,11 +27,19 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Install build tools (Linux)
+      - name: Install build tools + Raylib deps (Linux)
         if: runner.os == 'Linux'
         run: |
           apt-get update -qq
+          # Build essentials
           apt-get install -y cmake build-essential ninja-build zip unzip git curl
+          # Raylib Linux dependencies (X11, OpenGL, Wayland, audio)
+          # See https://github.com/raysan5/raylib/wiki/Working-on-GNU-Linux
+          apt-get install -y \
+            libasound2-dev \
+            libx11-dev libxrandr-dev libxi-dev libxcursor-dev libxinerama-dev \
+            libxkbcommon-dev libwayland-dev \
+            libgl1-mesa-dev libglu1-mesa-dev
 
       - name: Configure CMake
         run: cmake -B build -DCMAKE_BUILD_TYPE=${{ inputs.build_type }}