feat: add Into and Must generic helpers

[tdakkota]

No description provided.

[codecov]

Codecov Report

Merging #19 (b53f5de) into main (3d2f4f4) will increase coverage by 1.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #19      +/-   ##
==========================================
+ Coverage   84.93%   86.01%   +1.08%     
==========================================
  Files           6        8       +2     
  Lines         219      236      +17     
==========================================
+ Hits          186      203      +17     
  Misses         29       29              
  Partials        4        4              

Impacted Files	Coverage Δ
into.go	100.00% <100.00%> (ø)
must.go	100.00% <100.00%> (ø)
wrap.go	80.00% <0.00%> (+5.71%)	⬆️

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