refactor: change function definitions to const for improved performance and clarity

src-tauri/src/process/guard.rs

@@ -20,7 +20,7 @@ impl Drop for CommandChildGuard {
 }
 
 impl CommandChildGuard {
-    pub fn new(child: CommandChild) -> Self {
+    pub const fn new(child: CommandChild) -> Self {
         Self(Some(child))
     }