Configure font size of inline hints

### Description

There seems to be no way to configure the font size of Java inline hints (and also font color). Would it be possible to add that?

### Use case/motivation

Inline hints use a smaller font size than the one configured for the source code. For the latter I use the smallest size I can easily read, which by definition results in the inline hints not being easily readable anymore. I would like them to be the same size, and only have them be distinguished by color (or possibly other markup).

### Related issues

This also applies to inline hints shown by the debugger.

### Are you willing to submit a pull request?

Yes

Start by locating the Java inline-hint rendering and configuration entry points, then check the related debugger inline hints mentioned in the issue. Done means users can configure their font size and font color, with the settings applying to both kinds of hints.

Written by the indexing model from the issue text.