refactor: 迁移 shader.wgsl 至 static/wgsl/，新增 model 模块

src/main.rs

@@ -1,12 +1,13 @@
 mod app;
 mod connection;
 mod matrix;
+mod recording;
 mod render;
 mod serial_core;
 mod theme;
 mod ui;
-mod recording;
 mod utils;
+mod model;
 use app::EskinDesktopApp;
 use eframe::egui;