Add spelling and docstring enforcement

[blink1073]

No description provided.

[codecov]

Codecov Report

Base: 85.52% // Head: 85.39% // Decreases project coverage by -0.12% ⚠️

Coverage data is based on head (64f0b25) compared to base (bd91a69).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #72      +/-   ##
==========================================
- Coverage   85.52%   85.39%   -0.13%     
==========================================
  Files           7        7              
  Lines         228      226       -2     
  Branches       38       38              
==========================================
- Hits          195      193       -2     
  Misses         23       23              
  Partials       10       10              

Impacted Files	Coverage Δ
jupyter_server_terminals/_version.py	100.00% <ø> (ø)
jupyter_server_terminals/api_handlers.py	100.00% <ø> (ø)
jupyter_server_terminals/app.py	75.51% <ø> (ø)
jupyter_server_terminals/base.py	100.00% <ø> (ø)
jupyter_server_terminals/handlers.py	77.77% <ø> (ø)
jupyter_server_terminals/terminalmanager.py	88.46% <ø> (-0.29%)	⬇️

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