Provide a way to customize caret width for platforms other than desktop

[jellynoone]

Feature description
Currently, caret width is not customizable for Android or iOS. Neither:

• SuperEditorIosHandlesDocumentLayerBuilder or
• SuperEditorAndroidHandlesDocumentLayerBuilder

expose these configurations.

However, DefaultCaretOverlayBuilder does:

super_editor/super_editor/lib/src/default_editor/super_editor.dart

Lines 1093 to 1103 in 661ecb8

	class DefaultCaretOverlayBuilder implements SuperEditorLayerBuilder {
	const DefaultCaretOverlayBuilder({
	this.caretStyle = const CaretStyle(
	width: 2,
	color: Colors.black,
	),
	this.platformOverride,
	this.displayOnAllPlatforms = false,
	this.displayCaretWithExpandedSelection = true,
	this.blinkTimingMode = BlinkTimingMode.ticker,
	});

Would it be possible to offer the same customization options to iOS and Android counterparts?

User Behavior
The request doesn't ask for any additional features the user could perform. Simply, additional styling capabilities for the developer to use.
(The developer could extend these capabilities to then offer users a way to personalize the appearance of the caret if desired. Which is currently only possible if the developer chooses to rewrite the existing layers themselves.)

Feature value
Ideally, the client of the package would be able to customize small details like caret width, since these details can end up, making a big difference in feeling of the application.