support protobuf highlight

[cruvie]

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

The language 'protobuf' is not loaded, falling back to 'txt' for syntax highlighting.

Describe the solution you'd like

support protobuf highlight

Describe alternatives you've considered

I found shiki has already supported protobuf https://github.com/shikijs/shiki/pull/446

Additional context

No response

Validations

• [X] Follow our Code of Conduct
• [X] Read the docs.
• [X] Read the Contributing Guidelines.
• [X] Check that there isn't already an issue that asks for the same feature to avoid creating a duplicate.

[brc-dd]

shiki doesn't support that - https://github.com/shikijs/textmate-grammars-themes/blob/57d88ad0bfccc6c50a5ea7bb9715f2a7d9b7f9d4/packages/tm-grammars/index.js#L2242-L2252

Create a PR there to fix it. That PR you mentioned was probably reverted, most likely accidentally by their bot (IIRC it didn't respect newly added aliases, similar things had happened with csharp aliases too).

You can manually alias that till your PR gets released:

// .vitepress/config.ts

import { defineConfig } from 'vitepress';

export default defineConfig({
  markdown: {
    languageAlias: {
      protobuf: 'proto',
    },
  },
});

https://stackblitz.com/edit/vite-b9klwm?file=docs/index.md,docs/.vitepress/config.ts