feat: migrate to coral

[caarlos0]

migrate to the fork with less build dependencies - should make go install faster :)

[codecov]

Codecov Report

Merging #442 (19e395c) into main (6234af8) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##             main     #442   +/-   ##
=======================================
  Coverage   66.52%   66.52%           
=======================================
  Files          15       15           
  Lines        1882     1882           
=======================================
  Hits         1252     1252           
  Misses        491      491           
  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/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)

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