Migrate from Typer->Cyclopts. Drop python 3.8.

[BrianPugh]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 81.25000% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.41%. Comparing base (67d7a78) to head (ec94f07).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
belay/cli/main.py	66.66%	8 Missing ⚠️
belay/cli/cache.py	58.33%	5 Missing ⚠️
belay/cli/common.py	83.33%	2 Missing ⚠️
belay/cli/select.py	50.00%	2 Missing ⚠️
belay/telnetlib.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #201      +/-   ##
==========================================
+ Coverage   63.17%   63.41%   +0.23%     
==========================================
  Files          40       40              
  Lines        2322     2288      -34     
  Branches      509      505       -4     
==========================================
- Hits         1467     1451      -16     
+ Misses        756      743      -13     
+ Partials       99       94       -5     

Flag	Coverage Δ
unittests	63.37% <81.25%> (+0.23%)	⬆️

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