Implement LVGL with SDL for simulator (#16)

* Implemented LVGL with SDL for simulator

* cleanup

* added SDL to build

* build fix

* mutex fixes

* sim app cleanup and improvements

* docs updated

* fix for sdl?

* fix for SDL cmake setup

.github/workflows/pc.yml

@@ -8,9 +8,17 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: recursive
+      - uses: libsdl-org/setup-sdl@main
+        id: sdl
+        with:
+          install-linux-dependencies: true
+          version: 2-latest
+          version-sdl-image: 2-latest
       - name: Configure Project
         uses: threeal/cmake-action@v1.3.0
       - name: Prepare Project
         run: cmake -S ./ -B build
       - name: Build Project
+        env:
+          USE_SDL_WITH_NAMESPACE: true
         run: cmake --build build