refactor: use Box to store large config objects and add memory usage tests

- Refactored config-related structs to use Box for storing large objects (e.g., IRuntime, IProfiles, PrfItem) to reduce stack memory usage and improve performance.
- Updated related methods and assignments to handle Boxed types correctly.
- Added and improved unit tests to compare memory usage between Boxed and non-Boxed config objects, demonstrating the memory efficiency of Box.
- Test output now shows the size difference between stack-allocated and heap-allocated (Box) config objects.

src-tauri/src/core/core.rs

@@ -140,11 +140,11 @@ impl CoreManager {
     /// 使用默认配置
     pub async fn use_default_config(&self, msg_type: &str, msg_content: &str) -> Result<()> {
         let runtime_path = dirs::app_home_dir()?.join(RUNTIME_CONFIG);
-        *Config::runtime().draft() = IRuntime {
+        *Config::runtime().draft() = Box::new(IRuntime {
             config: Some(Config::clash().latest().0.clone()),
             exists_keys: vec![],
             chain_logs: Default::default(),
-        };
+        });
         help::save_yaml(
             &runtime_path,
             &Config::clash().latest().0,