feat: generate man pages

[caarlos0]

generate man pages using mango-coral.

[codecov]

Codecov Report

Merging #443 (fadd658) into main (72a4c47) will decrease coverage by 0.66%.
The diff coverage is 0.00%.

❗ Current head fadd658 differs from pull request most recent head 0b0acb8. Consider uploading reports for the commit 0b0acb8 to get more accurate results

@@            Coverage Diff             @@
##             main     #443      +/-   ##
==========================================
- Coverage   66.52%   65.86%   -0.67%     
==========================================
  Files          15       16       +1     
  Lines        1882     1901      +19     
==========================================
  Hits         1252     1252              
- Misses        491      510      +19     
  Partials      139      139              

Impacted Files	Coverage Δ
internal/cmd/docs.go	0.00% <0.00%> (ø)
internal/cmd/init.go	0.00% <0.00%> (ø)
internal/cmd/man.go	0.00% <0.00%> (ø)
internal/cmd/package.go	0.00% <0.00%> (ø)
internal/cmd/root.go	0.00% <0.00%> (ø)
internal/cmd/schema.go	0.00% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 596412c...0b0acb8. Read the comment docs.