Wrapping up bedrock implementation

crates/galaxy_core/src/execution_mode.rs

@@ -1,5 +1,5 @@
-use std::sync::OnceLock;
 use galaxyui::{Entity, ModelContext, SingletonEntity};
+use std::sync::OnceLock;
 
 // Global execution mode, for logic that runs outside the UI framework.
 static GLOBAL_EXECUTION_MODE: OnceLock<ExecutionMode> = OnceLock::new();