add a setting to control show/hide terminal button for status bar (#10593)

Release Notes:

- Added a setting to show/hide the terminal button in the status bar:
`{"terminal": {"button": false}}` to hide it. (#10513)

---------

Co-authored-by: Thorsten Ball <mrnugget@gmail.com>

docs/src/configuring_zed.md

@@ -908,6 +908,7 @@ These values take in the same options as the root-level settings with the same n
   "font_features": null,
   "font_size": null,
   "option_as_meta": false,
+  "button": false
   "shell": {},
   "toolbar": {
     "title": true
@@ -1086,6 +1087,16 @@ See Buffer Font Features
 
 At the moment, only the `title` option is available, it controls displaying of the terminal title that can be changed via `PROMPT_COMMAND`. If the title is hidden, the terminal toolbar is not displayed.
 
+### Terminal Button
+
+- Description: Control to show or hide the terminal button in the status bar
+- Setting: `button`
+- Default: `true`
+
+**Options**
+
+`boolean` values
+
 ### Working Directory
 
 - Description: What working directory to use when launching the terminal.