Representation conversion in Tq

[mdm-code]

• Moved lexer scanner conditions from if to for loop
• Included notes on repr. conversion in the README

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 87.53%. Comparing base (bfc10e3) to head (11a7564).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/lexer/lexer.go	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #39      +/-   ##
==========================================
+ Coverage   87.15%   87.53%   +0.37%     
==========================================
  Files          12       12              
  Lines         833      826       -7     
==========================================
- Hits          726      723       -3     
+ Misses         82       79       -3     
+ Partials       25       24       -1     

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