[Content]: Add twoslash to code snippets

[jer3m01]

Code snippets could benefit from using twoslash to annotate examples: https://twoslash.matthiesen.dev/getting-started/basic/.

Depending on the implementation in solidbase it might be an option to enable in app.config.ts.

[jer3m01]

Twoslash is now enabled by default in SolidBase!

[brenelz]

Do we need to do anything here? Sounds like its enabled by default now so we can use it in code snippets?

[LadyBluenotes]

I believe there's an error with twoslash at the moment but @jer3m01 will have to confirm

[jer3m01]

There were a few missing shiki theme variables (we should be able to set them in config), and possibly a render bug.
Haven't tried it in a while.