feature: Recognise all keyword groups as keywords for purposes of styling

[ghost]

Did you check the docs?

• I have read all the tokyonight.nvim docs

Is your feature request related to a problem? Please describe.

The grammar for Zig divides keywords into subgroups as prescribed by nvim-treesitter. However, only the @keyword group is affected by tokyonight's options.styles.keywords, producing an ugly result¹.

Describe the solution you'd like

I'd like tokyonight to style all prescribed keyword groups with the options.styles.keywords options. So for instance under the default styling, all of these groups would be italicised.

Describe alternatives you've considered

An alternative would be to PR tree-sitter-zig to clump all keywords under the @keyword group, like Go and Rust do, but it would be a shame to throw away that due diligence for tool compatibility.

Additional context

Footnotes

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