Add Pyright as a subschema of PyProject

[InSyncWithFoo]

Fixes #3525.

[InSyncWithFoo]

I basically copied the whole schema from Pyright's repository, which is licensed under MIT. Any ideas how to add a copy of that license to this repository, as per the conditions?

[hyperupcall]

I basically copied the whole schema from Pyright's repository, which is licensed under MIT. Any ideas how to add a copy of that license to this repository, as per the conditions?

If you add a $comment to the top level mentioning the license, i think that should be enough. I would also recommend mentioning that the file is a copy-and-pasted from the original, and the date, so we know how out of date it is. Related to #2731

[hyperupcall]

Usually, for this kind of file, I would request for you to change the name of the file pyright.json (without the partial-) to be consistent since pyrightconfig.json is a thing. But I think it is a good call, so this addition does not get confused with the actual (more up to date) pyright schema.

You can take a look at this section of contributing.md to fix the build. Once it passes, i'll be able to merge

[InSyncWithFoo]

@hyperupcall Done (probably). Anything else before I can get better autocompletion in my IDE?

[hyperupcall]

Nope, thanks!