Add tests for token escaper class

[tylerhutcherson]

Adds a set of unit tests on both the underlying token escaping class as well as the Tag filterable fields that utilize it.

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (4aab8b7) 87.12% compared to head (234bf8d) 87.43%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #69      +/-   ##
==========================================
+ Coverage   87.12%   87.43%   +0.30%     
==========================================
  Files          16       17       +1     
  Lines         870      899      +29     
==========================================
+ Hits          758      786      +28     
- Misses        112      113       +1     

Files	Coverage Δ
redisvl/query/filter.py	90.79% <100.00%> (ø)
redisvl/utils/utils.py	90.00% <100.00%> (+3.46%)	⬆️
redisvl/utils/token_escaper.py	93.33% <93.33%> (ø)

... and 2 files with indirect coverage changes

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[Spartee]

Added some test names, but otherwise looks great!