feat: add APIs to enable/disable spell checker (#26276)

* feat: add APIs to enable/disable bulitin spell checker

* feat: add togglespellchecker menu item role

docs/api/menu-item.md

@@ -88,6 +88,7 @@ The `role` property can have following values:
 * `resetZoom` - Reset the focused page's zoom level to the original size.
 * `zoomIn` - Zoom in the focused page by 10%.
 * `zoomOut` - Zoom out the focused page by 10%.
+* `toggleSpellChecker` - Enable/disable builtin spell checker.
 * `fileMenu` - Whole default "File" menu (Close / Quit)
 * `editMenu` - Whole default "Edit" menu (Undo, Copy, etc.).
 * `viewMenu` - Whole default "View" menu (Reload, Toggle Developer Tools, etc.)

docs/api/session.md

@@ -673,6 +673,16 @@ this session just before normal `preload` scripts run.
 Returns `String[]` an array of paths to preload scripts that have been
 registered.
 
+#### `ses.setSpellCheckerEnabled(enable)`
+
+* `enable` Boolean
+
+Sets whether to enable the builtin spell checker.
+
+#### `ses.isSpellCheckerEnabled()`
+
+Returns `Boolean` - Whether the builtin spell checker is enabled.
+
 #### `ses.setSpellCheckerLanguages(languages)`
 
 * `languages` String[] - An array of language codes to enable the spellchecker for.
@@ -803,6 +813,10 @@ The following properties are available on instances of `Session`:
 A `String[]` array which consists of all the known available spell checker languages.  Providing a language
 code to the `setSpellCheckerLanguages` API that isn't in this array will result in an error.
 
+#### `ses.spellCheckerEnabled`
+
+A `Boolean` indicating whether builtin spell checker is enabled.
+
 #### `ses.cookies` _Readonly_
 
 A [`Cookies`](cookies.md) object for this session.