Rename debug: commands to dev: (#30675)

Closes #ISSUE

Release Notes:

- Breaking change: The actions used while developing Zed have been
renamed from `debug:` to `dev:` to avoid confusion with the new debugger
feature:
- - `dev::OpenDebugAdapterLogs`
- - `dev::OpenSyntaxTreeView`
- - `dev::OpenThemePreview`
- - `dev::OpenLanguageServerLogs`
- - `dev::OpenKeyContextView`

crates/workspace/src/theme_preview.rs

@@ -11,7 +11,7 @@ use ui::{
 
 use crate::{Item, Workspace};
 
-actions!(debug, [OpenThemePreview]);
+actions!(dev, [OpenThemePreview]);
 
 pub fn init(cx: &mut App) {
     cx.observe_new(|workspace: &mut Workspace, _, _| {