Migrate to latest SvelteKit

[carstenlebek]

Seems like these changes make kit-docs work with v1 SvelteKit.

• Ignoring wrong file type warning from api extractor
  • SvelteKit outputs d.ts files to the same directory as js files. Probable cause of the warning
• Removed try catch statements from stores. Seems to work fine without them
• Fixed the vite server loop with #71
• Return null, if category is undefined
• Added lang support for shiki for json and toml

@mihar-22 please have a look at the proposed changes. I've built a svelte package and really don't want to build my own docs 😃

[mihar-22]

I can’t even begin to describe how much I appreciate this! It’s really late here but I’ll look at first thing in the morning :)

Thanks heaps for the time you’ve put in to fix this.

[mihar-22]

Everything lookkkkkkkkkkkkkkkkkkkkkks gooooooooooooooooooooooooooooood 🚀 🚀 🚀