Add (way to add) Svelte language support to CodeMirror editor #211

Is your feature request related to a problem?

I want to create tutorial for Svelte using tutotiralkit, but provided CodeMirror instance does not support Svelte files ie. no syntax highlighting.

Describe the solution you'd like.

Add Svelte language description to CodeMirror inside CodeMirrorEditor/languages.ts

Describe alternatives you've considered.

Good alternative is to give developer a way to customize CodeMirror instance. Would be better in the long term. On the other hand, you could take a shortcut and add Svelte support directly. Your blogpost mentions Svelte a lot and I imagine community would benefit even from such shortcut.

Additional context

I found this package: @replit/codemirror-lang-svelte which is also used by code mirror instance on learn.svelte.dev