settings ui: Add missing setting elements (#39644)

Added the following settings to the UI

Editor Page - Scrollbar Section (9 settings)
- Show
- Cursors
- Git Diff
- Search Results
- Selected Text
- Selected Symbol
- Diagnostics
- Horizontal Scrollbar
- Vertical Scrollbar

 Editor Page - Minimap Section (6 settings)
- Show
- Display In
- Thumb
- Thumb Border
- Current Line Highlight
- Max Width Columns

Editor Page - Editor Behavior Section (3 settings)
- Expand Excerpt Lines
- Excerpt Context Lines
- Minimum Contrast For Highlights

 Debugger Page (7 settings)
- Stepping Granularity
- Save Breakpoints
- Timeout
- Dock
- Log DAP Communications
- Format DAP Log Messages
- Button

 Panels Page - Git Panel Section (3 settings)
- Button
- Dock
- Default Width

Collaboration Page - Experimental Section (4 settings)
- Auto Microphone Volume
- Auto Speaker Volume
- Denoise
- Legacy Audio Compatible

Release Notes:

- N/A

crates/project/src/project_settings.rs

@@ -300,8 +300,8 @@ pub struct GitSettings {
     pub git_gutter: settings::GitGutterSetting,
     /// Sets the debounce threshold (in milliseconds) after which changes are reflected in the git gutter.
     ///
-    /// Default: null
-    pub gutter_debounce: Option<u64>,
+    /// Default: 0
+    pub gutter_debounce: u64,
     /// Whether or not to show git blame data inline in
     /// the currently focused line.
     ///
@@ -446,7 +446,7 @@ impl Settings for ProjectSettings {
         let git = content.git.as_ref().unwrap();
         let git_settings = GitSettings {
             git_gutter: git.git_gutter.unwrap(),
-            gutter_debounce: git.gutter_debounce,
+            gutter_debounce: git.gutter_debounce.unwrap_or_default(),
             inline_blame: {
                 let inline = git.inline_blame.unwrap();
                 InlineBlameSettings {