sync: user's Lity3D_source.zip changes

- Engine core: improved initialization and lifecycle
- Renderer: camera and rendering pipeline updates
- Editor: updated editor code
- Window: improved window handling
- Demo/main.c: scene demo with AssetManager + scene loading
- build.bat: updated build script
- 11 files modified from user's manual edits

Engine/Editor/editor.c

@@ -59,7 +59,7 @@ void editor_render(Editor* ed) {
     uilayer_flush(&ed->ui, ctx);
 
     float sw2 = sw, sh2 = sh;
-    bitmap_font_draw(&ed->font, ctx, "MiMo Engine Editor", 10, 6,
+    bitmap_font_draw(&ed->font, ctx, "Lity3D Engine Editor", 10, 6,
                      0.4f, 0.75f, 1.0f, 1.0f, sw2, sh2);
 
     const char* menu[] = {"File", "Edit", "View", "Build", "Help"};