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/Core/engine.c

@@ -68,7 +68,7 @@ int engine_init(Engine* engine, const EngineConfig* config) {
 
     // 初始化日志
     logger_init("engine.log");
-    LOG_INFO("Initializing MiMo Engine ASM...");
+    LOG_INFO("Initializing Lity3D Engine...");
 
     // 初始化计时器
     timer_init();
@@ -124,7 +124,7 @@ int engine_init(Engine* engine, const EngineConfig* config) {
     engine->running = 1;
     engine->frame_count = 0;
 
-    LOG_INFO("MiMo Engine ASM initialized successfully.");
+    LOG_INFO("Lity3D Engine initialized successfully.");
     return 1;
 }
 
@@ -184,7 +184,7 @@ void engine_run(Engine* engine) {
 void engine_shutdown(Engine* engine) {
     if (!engine->initialized) return;
 
-    LOG_INFO("Shutting down MiMo Engine ASM...");
+    LOG_INFO("Shutting down Lity3D Engine...");
 
     if (engine->renderer) {
         renderer_destroy(engine->renderer);