add build system, vendor deps, init stuff

src/main.cpp

@@ -0,0 +1,51 @@
+#include "platform/platform.h"
+#include "renderer/renderer.h"
+#include "imgui.h"
+
+int main(int argc, char **argv)
+{
+    (void)argc;
+    (void)argv;
+
+    PlatformWindowDesc window_desc = {};
+    PlatformWindow *window = platform_create_window(&window_desc);
+    if (!window)
+        return 1;
+
+    int32_t w, h;
+    platform_get_size(window, &w, &h);
+
+    RendererDesc renderer_desc = {};
+    renderer_desc.window_handle = platform_get_native_handle(window);
+    renderer_desc.width         = w;
+    renderer_desc.height        = h;
+    Renderer *renderer = renderer_create(&renderer_desc);
+    if (!renderer) {
+        platform_destroy_window(window);
+        return 1;
+    }
+
+    int32_t last_w = w, last_h = h;
+    bool show_demo = true;
+
+    while (platform_poll_events(window)) {
+        platform_get_size(window, &w, &h);
+        if (w != last_w || h != last_h) {
+            renderer_resize(renderer, w, h);
+            last_w = w;
+            last_h = h;
+        }
+
+        if (!renderer_begin_frame(renderer))
+            continue;
+
+        if (show_demo)
+            ImGui::ShowDemoWindow(&show_demo);
+
+        renderer_end_frame(renderer);
+    }
+
+    renderer_destroy(renderer);
+    platform_destroy_window(window);
+    return 0;
+}