feat: add MethodGet(methodID)

[kkweon]

• It will be used to query each method

[codecov]

Codecov Report

Merging #14 (d783bf8) into main (87730c8) will decrease coverage by 1.45%.
The diff coverage is 55.55%.

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
- Coverage   70.93%   69.47%   -1.46%     
==========================================
  Files           8        9       +1     
  Lines          86       95       +9     
==========================================
+ Hits           61       66       +5     
- Misses         13       15       +2     
- Partials       12       14       +2     

Impacted Files	Coverage Δ
method_get.go	55.55% <55.55%> (ø)

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