feat!: provide input via stdin and as an argument

[tbckr]

Provide your prompt via stdin and add additional descriptions via an argument.

• If one argument exists, it is expected to be an additional prompt.
• If two arguments exists, the first arg is the persona and the second arg is the additional prompt.

[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (9235f9b) 74.76% compared to head (dde11af) 74.33%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #140      +/-   ##
==========================================
- Coverage   74.76%   74.33%   -0.43%     
==========================================
  Files          16       16              
  Lines        1042     1060      +18     
==========================================
+ Hits          779      788       +9     
- Misses        186      192       +6     
- Partials       77       80       +3     

Files	Coverage Δ
cli/root.go	71.78% <62.50%> (-1.50%)	⬇️

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