Improve rust syntax highlighting

[Iovans]

Check for existing issues

• Completed

Describe the feature

the rust syntax in zed isn't great many word have not colors, vscode instead has a better syntax

If applicable, add mockups / screenshots to help present your vision of the feature

[Moshyfawn]

This has already been raised. Let's close this issue in favour of the existing one to keep the conversation in one place. Be sure to +👍 and add any additional information or examples to the other thread.

Duplicate of

• Improve rust syntax highlighting. #7679