refactor doc

[ktong]

No description provided.

[codecov]

Codecov Report

Merging #62 (7e5572b) into main (1ede0f6) will increase coverage by 1.08%.
The diff coverage is 92.30%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #62      +/-   ##
==========================================
+ Coverage   71.01%   72.10%   +1.08%     
==========================================
  Files          17       17              
  Lines         659      656       -3     
==========================================
+ Hits          468      473       +5     
+ Misses        179      173       -6     
+ Partials       12       10       -2     

Components	Coverage Δ
konf	86.44% <92.30%> (+1.92%)	⬆️
file	71.11% <ø> (ø)
pflag	40.57% <ø> (ø)

Files	Coverage Δ
config.go	80.19% <100.00%> (ø)
provider/env/env.go	100.00% <ø> (+13.04%)	⬆️
provider/file/file.go	100.00% <ø> (ø)
provider/flag/flag.go	92.85% <ø> (ø)
provider/fs/fs.go	100.00% <ø> (ø)
provider/pflag/pflag.go	27.77% <ø> (ø)
default.go	90.90% <90.90%> (ø)