feat: added json schema generation

[FlyinPancake]

I thought it would be nice to have a JSON schema for the configuration. This is still considered to be a draft, so any changes are welcome, perhaps moving the whole thing behind a feature flag.

This will help people who use LSPs with neovim or VSC to have a nicer experience having type completions with their config files

[LivacoNew]

Seems to work fine with my NeoVim/Taplo setup. I do think this shouldn't be in the actual runtime, and moreso done by us and bundled into releases for people to add in. Best way to do that is indeed hiding it behind a feature flag and then I can just run it myself on release, that way the release binaries don't have this bundled in.

[LivacoNew]

To-Do;

• Gate behind feature flag
• Update CI to generate these for each commit
• Document flag in wiki
• Add wiki page for it
• Update default configs to include schema file - Only do this on full releases to prevent micromanaging it on each commit

[FlyinPancake]

I don't know how the Wiki pages are handled, so I didn't do that one 😞.

Furthermore, the CI does not touch the default config as of now, I don't know how to do it without hacks.

[LivacoNew]

I'll see if I can figure out the config file stuff in a bit, probably just doing some funky stuff in the build scripts.