Improved syntax highlighting support for Rust

[vhladko]

Resolves #167

Improved syntax highlighting support for Rust.

1. Entity types are colorised with #8FBCBB;
2. Macros are colorised with #88C0D0 and bold font to make them visually different from "normal" functions.
3. Attributes and derives are colored with #5E81AC.
4. Interpolation brackets are colored with #A3BE8C to meet whole string color. ( Not sure about this one, in TS they are different, but in a Vim theme, they are equal for Rust language )
5. As a result of 1, import statements and paths are better colored with keyword and type colors.

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[arcticicestudio]

Hi @vhladko 👋, thanks for your contribution 👍
I'll try to review and test the changes within the next weeks.

[vhladko]

Hey there @arcticicestudio, cool, waiting for your feedback ! :)

[vhladko]

Hello, @arcticicestudio , any updates on this one ?

[arcticicestudio]

@vhladko There are over 400+ other issues & PRs so time is way too limited to get everything done quickly 🙈
Anyway, since #167 is a real long-time issue this should be finally resolved. I've reviewed the changes and added suggestions as well as an addition.

[vhladko]

@arcticicestudio sure, I did't want to push you. I've applied all your suggestions.

[arcticicestudio]

Looks good to me, thanks again 🚀

[arcticicestudio]

Release note & changelog assets

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