Update themes for Godot 4.x's new syntax highlighting colors

I am new to Godot, but I was looking to change my editor theme colors when I came across your project. However, when changing the theme I have noticed some of the colors were not changing. When I reviewed the color names vs what I see in the `tet` files, the following seemed to be missing. The one I was particularly interested in was `gdscript/Node Reference Color` which wasn't changing on any of the themes.

These are the ones I saw that are missing:
- Control Flow Keyword Color
- Completion Scroll Hovered Color
- gdscript/Global Function Color
- gdscript/Node Reference Color
- gdscript/Annotation Color
- gdscript/String Name Color

Start by comparing the listed missing color names with the project's theme files and how Godot 4.x syntax colors are represented there. Update the affected themes so each listed color is included and verify that changing those colors affects the corresponding editor elements.

Written by the indexing model from the issue text.