workspace: Allow disabling of padding on zoomed panels (#31913)

Screenshot:

| Before | After |
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![image](https://github.com/user-attachments/assets/629e7da2-6070-4abb-b469-3b0824524ca4)
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![image](https://github.com/user-attachments/assets/99e54412-2e0b-4df9-9c40-a89b0411f6d8)
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![image](https://github.com/user-attachments/assets/e99da846-f39b-47b5-808e-65c22a1af47b)
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![image](https://github.com/user-attachments/assets/ccd4408f-8cce-44ec-a69a-81794125ec99)
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Release Notes:

- Added `zoomed_padding` to allow disabling of padding around zoomed
panels

Co-authored-by: Mikayla Maki <mikayla@zed.dev>

crates/workspace/src/workspace_settings.rs

@@ -29,6 +29,7 @@ pub struct WorkspaceSettings {
     pub on_last_window_closed: OnLastWindowClosed,
     pub resize_all_panels_in_dock: Vec<DockPosition>,
     pub close_on_file_delete: bool,
+    pub zoomed_padding: bool,
 }
 
 #[derive(Copy, Clone, Default, Serialize, Deserialize, JsonSchema)]
@@ -202,6 +203,12 @@ pub struct WorkspaceSettingsContent {
     ///
     /// Default: false
     pub close_on_file_delete: Option<bool>,
+    /// Whether to show padding for zoomed panels.
+    /// When enabled, zoomed bottom panels will have some top padding,
+    /// while zoomed left/right panels will have padding to the right/left (respectively).
+    ///
+    /// Default: true
+    pub zoomed_padding: Option<bool>,
 }
 
 #[derive(Deserialize)]