fix: improve generated enum keys in experimental parser

[mrlubos]

Closes #1244
Closes #1315

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🦋 Changeset detected

Latest commit: 01c3d69

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@hey-api/openapi-ts	Patch

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 65.13%. Comparing base (8976ccd) to head (01c3d69).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...enapi-ts/src/plugins/@hey-api/typescript/plugin.ts	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1326      +/-   ##
==========================================
+ Coverage   65.12%   65.13%   +0.01%     
==========================================
  Files         137      137              
  Lines       21131    21126       -5     
  Branches     1825     1825              
==========================================
- Hits        13762    13761       -1     
+ Misses       7365     7361       -4     
  Partials        4        4              

Flag	Coverage Δ
unittests	65.13% <0.00%> (+0.01%)	⬆️

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