Update & migrate types from discord-types package

[Vendicated]

We use the discord-types npm package for discord webpack module types. But this module hasn't properly been updated in years, so it is very outdated

We should

• migrate all types we use to be included first party inside the Vencord repo. this is much more convenient than an npm package as it allows us to easily make changes to types. they could just be added alongside the existing types in src/webpack/common/types
• update all types to add new fields and remove ones that no longer exist

To have as little work as possible, the best solution would be to grab an example entity from live Discord as json, and use the following tool to generate a typescript interface from it:
https://marketplace.visualstudio.com/items?itemName=GregorBiswanger.json2ts