docs: Document debugger.dock setting (#32038)

Closes #ISSUE

Release Notes:

- N/A

docs/src/debugger.md

@@ -279,6 +279,7 @@ The debug adapter will then stop whenever an exception of a given kind occurs. W
 
 ## Settings
 
+- `dock`: Determines the position of the debug panel in the UI.
 - `stepping_granularity`: Determines the stepping granularity.
 - `save_breakpoints`: Whether the breakpoints should be reused across Zed sessions.
 - `button`: Whether to show the debug button in the status bar.
@@ -286,6 +287,24 @@ The debug adapter will then stop whenever an exception of a given kind occurs. W
 - `log_dap_communications`: Whether to log messages between active debug adapters and Zed.
 - `format_dap_log_messages`: Whether to format DAP messages when adding them to the debug adapter logger.
 
+### Dock
+
+- Description: The position of the debug panel in the UI.
+- Default: `bottom`
+- Setting: debugger.dock
+
+**Options**
+
+1. `left` - The debug panel will be docked to the left side of the UI.
+2. `right` - The debug panel will be docked to the right side of the UI.
+3. `bottom` - The debug panel will be docked to the bottom of the UI.
+
+```json
+"debugger": {
+  "dock": "bottom"
+},
+```
+
 ### Stepping granularity
 
 - Description: The Step granularity that the debugger will use