Rename client objects

[alcarney]

Description (e.g. "Related to ...", etc.)

This renames the new client objects to something that better reflects their purpose.

• In pygls/client.py, Client is now called JsonRPCClient
• The auto generated LanguageClient in pygls/lsp/client.py is now called BaseLanguageClient

This PR also performs some other house keeping tasks

• Bump lsprotocol to 2023.0.0a3 which should include all the fixes required for #356
• The auto generated client now references LSP types via the types module rather than importing them directly which cuts out the 100s of lines of imports at the top of the file
• Update the documentation to include reference API documentation for the JsonRPCClient and BaseLanguageClient

Code review checklist (for code reviewer to complete)

• [ ] Pull request represents a single change (i.e. not fixing disparate/unrelated things in a single PR)
• [ ] Title summarizes what is changing
• [ ] Commit messages are meaningful (see this for details)
• [ ] Tests have been included and/or updated, as appropriate
• [ ] Docstrings have been included and/or updated, as appropriate
• [ ] Standalone docs have been updated accordingly

[alcarney]

@tombh would it be possible to relax commit body length lint? I'd like to include a url in the commit message but it's triggering the rule.... https://github.com/openlawlibrary/pygls/actions/runs/6018606341/job/16327093410?pr=359#step:7:27

[tombh]

Sure! Those are just the defaults anyway.

[tombh]

This looks good, actually I mean great, some really nice changes. Let's merge this then?

[alcarney]

Yes, sounds good :)