Clean up docs build and typing

[blink1073]

Fixes #1125

• Inlines autogen_api.py to avoid all the path shenanigans.
• Cleans up usage of version in conf.py.
• Cleans up type ignores (relies on forthcoming releases of jupyter_server and jupyter_server_terminals

[codecov]

Codecov Report

Base: 75.67% // Head: 80.06% // Increases project coverage by +4.38% 🎉

Coverage data is based on head (8bd3910) compared to base (3d516b3).
Patch coverage: 88.88% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1168      +/-   ##
==========================================
+ Coverage   75.67%   80.06%   +4.38%     
==========================================
  Files          68       68              
  Lines        8149     8150       +1     
  Branches     1605     1605              
==========================================
+ Hits         6167     6525     +358     
+ Misses       1543     1197     -346     
+ Partials      439      428      -11     

Impacted Files	Coverage Δ
jupyter_server/services/sessions/sessionmanager.py	88.36% <0.00%> (ø)
jupyter_server/gateway/managers.py	83.37% <100.00%> (ø)
jupyter_server/services/events/handlers.py	87.93% <100.00%> (ø)
jupyter_server/terminal/__init__.py	100.00% <100.00%> (+100.00%)	⬆️
jupyter_server/terminal/api_handlers.py	100.00% <100.00%> (+100.00%)	⬆️
jupyter_server/terminal/terminalmanager.py	100.00% <100.00%> (+100.00%)	⬆️
jupyter_server/utils.py	85.46% <100.00%> (+30.23%)	⬆️
jupyter_server/services/sessions/handlers.py	79.20% <0.00%> (+0.79%)	⬆️
jupyter_server/auth/identity.py	86.09% <0.00%> (+1.32%)	⬆️
jupyter_server/base/handlers.py	78.82% <0.00%> (+1.76%)	⬆️
... and 14 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[vidartf]

Some type errors on your main merge :)

[blink1073]

Yeah, it looks like our terminals shim is referencing things that do not exist in jupyter_server_terminals, I need to sort this out.