Initial scaffolding.

examples/CMakeLists.txt

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+# Simple examples for using hdk-sdl.  
+
+add_executable(HelloWorld HelloWorld.cpp)
+target_link_libraries(HelloWorld PRIVATE hdk-sdl)

examples/HelloWorld.cpp

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+#include <hdk/sdl.hpp>
+
+using namespace hdk::sdl;
+
+Window window { nullptr };
+//Renderer renderer { nullptr };
+
+int main(int argc, char* argv[])
+{
+    window = Window::Create("Hello World", 800, 600, 0);
+    if (!window) {
+        SDL_Log("Failed to create window: %s", SDL_GetError());
+        return 1;
+    }
+    //
+    SDL_Event event;
+    bool running = true;
+    while (running) {
+        while (SDL_PollEvent(&event)) {
+            if (event.type == SDL_EVENT_QUIT) {
+                running = false;
+            }
+        }
+    }
+    window = nullptr; // Explicitly release the window before quitting SDL
+    return 0;
+}