Binary Length Improvements

[PraneethJain]

#207

• Moved binary_length.jl from the string folder to the math folder.
• Fix incorrect time complexity in the function documentation.
• Added a faster implementation of bin_length.
• Added tests for all the bin_length functions.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ffd660b) 96.27% compared to head (a8ef3c4) 97.38%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #212      +/-   ##
==========================================
+ Coverage   96.27%   97.38%   +1.11%     
==========================================
  Files         137      137              
  Lines        1718     1721       +3     
==========================================
+ Hits         1654     1676      +22     
+ Misses         64       45      -19     

Files	Coverage Δ
src/math/Math.jl	100.00% <ø> (ø)
src/math/binary_length.jl	100.00% <100.00%> (ø)

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