Documentation Issue: Unclear how to make custom ToolSettings

[simihartstein]

I'm trying to use a custom react component for a ToolSetting. From the documentation, I can't figure out how to do that without using the deprecated ToolUiProvider.

It would be great to add some documentation on if it's still possible to use a custom React component for a toolSetting, and if so, point to some other documentation related to how it's done.

Related, ToolSettingEntry is not listed as deprecated, but seems to only be used with the deprecated ToolUiProvider. This should possibly be deprecated as well.

As a sidenote, the custom ToolSetting I want to add is just a standard ComboBox. It would be great to have this natively supported.

Found on page https://www.itwinjs.org/reference/appui-react/toolsettings/tooluiprovider - "undefined"

[ben-polinsky]

Whatever is change is made here, we should also link to it from our tools docs.