feat!: use cova for argument parsing

[charlesrocket]

A little verbose, but very effective.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.18%. Comparing base (b3985f1) to head (559f962).
Report is 7 commits behind head on trunk.

Additional details and impacted files

@@           Coverage Diff           @@
##            trunk       #3   +/-   ##
=======================================
  Coverage   71.18%   71.18%           
=======================================
  Files           1        1           
  Lines         118      118           
=======================================
  Hits           84       84           
  Misses         34       34           

Files	Coverage Δ
src/main.zig	71.18% <100.00%> (ø)

[charlesrocket]

Works great. Need to revisit parsers later.