onboarding ui: Add editing page to onboarding page (#35298)

I added buttons for inlay values, showing the mini map, git blame, and
controlling the UI/Editor Font/Font size. The only thing left for this
page is some UI clean up and adding buttons for setting import from
VSCode/cursor.

I also added Numeric Stepper as a component preview.

Current state:
<img width="1085" height="585" alt="image"
src="https://github.com/user-attachments/assets/230df474-da81-4810-ba64-05673896d119"
/>


Release Notes:

- N/A

crates/editor/src/editor.rs

@@ -65,7 +65,7 @@ use display_map::*;
 pub use display_map::{ChunkRenderer, ChunkRendererContext, DisplayPoint, FoldPlaceholder};
 pub use editor_settings::{
     CurrentLineHighlight, DocumentColorsRenderMode, EditorSettings, HideMouseMode,
-    ScrollBeyondLastLine, ScrollbarAxes, SearchSettings, ShowScrollbar,
+    ScrollBeyondLastLine, ScrollbarAxes, SearchSettings, ShowMinimap, ShowScrollbar,
 };
 use editor_settings::{GoToDefinitionFallback, Minimap as MinimapSettings};
 pub use editor_settings_controls::*;