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)
|
|
![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)
|


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.rs

@@ -6633,6 +6633,10 @@ impl Render for Workspace {
                                         .inset_0()
                                         .shadow_lg();
 
+                                    if !WorkspaceSettings::get_global(cx).zoomed_padding {
+                                       return Some(div);
+                                    }
+
                                     Some(match self.zoomed_position {
                                         Some(DockPosition::Left) => div.right_2().border_r_1(),
                                         Some(DockPosition::Right) => div.left_2().border_l_1(),