Add literal.rs subtract

[kwon-heejeong]

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[codecov-commenter]

Codecov Report

Merging #409 (2010da1) into main (a9fb9ff) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #409      +/-   ##
==========================================
+ Coverage   90.45%   90.52%   +0.06%     
==========================================
  Files         144      144              
  Lines        8553     8563      +10     
==========================================
+ Hits         7737     7752      +15     
+ Misses        816      811       -5     

Impacted Files	Coverage Δ
src/data/literal.rs	88.53% <100.00%> (+2.52%)	⬆️

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