luv library changes

[T-727]

Hi!
I recommend switching to the included luv library in lua-language-server a little while back #127.

And a few days ago a new addon system was released to replace the included libraries, in order to cut bloat.
And so the 3rd-party system is deprecated and will be removed after some time.

I looked at how addons work and it seems the intended way to use them for non-vscode users is cloning and adding to workspace.userThirdParty, for neodev purposes that either involves a workflow job or submodules as far as I'm aware.
For submodules unfortunately the addons repo does not ship luv as a separate library anymore, it is included as part of the luvit addon instead (relevant discussion), so in order to add it as a submodule we either include the whole addon and be fine with the extra files or use workarounds such as this to include the single file that annotates uv.

If none of these are ideal we could also ask to get it separated in the discussion or make an issue.

[folke]

Thanks for letting me know!

I've just updated the build to include the single uv.lua file in the neodev types.
It will be updated every hour as part of the build.

f06c113