Bullet issues

Results 3 issues of


                                            Bullet

Add C# syntax highlighting

I also introduced some minor fixes in the code examples.

fix: foldout arrow rendered out of the inspector in 2022.3 and newer

## Description As mentioned in #66, hardcoded foldout position adjustment in [SubclassSelectorDrawer, lines 60 to 64](https://github.com/mackysoft/Unity-SerializeReferenceExtensions/blob/b7d76fb0c5133adc87e09c1d7aea87882a1d812a/Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/SubclassSelectorDrawer.cs#L60) for `UNITY_2022_2_OR_NEVER` is redundant for newer versions (2022.3 and forwards) so I replaced the...

[IMPROVE] Foldout rect.x adjustment for Unity 2022.2 or newer

### Improvement destription [SubclassSelectorDrawer, lines 60 to 64](https://github.com/mackysoft/Unity-SerializeReferenceExtensions/blob/b7d76fb0c5133adc87e09c1d7aea87882a1d812a/Assets/MackySoft/MackySoft.SerializeReferenceExtensions/Editor/SubclassSelectorDrawer.cs#L60) adjust foldout rectangle horizontal position by 12 units to the left for versions 2022.2 or newer like so: ``` #if UNITY_2022_2_OR_NEWER //...

enhancement