refactor: polish parser output

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Latest commit: 92b10e124c84d5da004bbd720592639f91561e8f

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Codecov Report

Attention: Patch coverage is 96.15385% with 4 lines in your changes missing coverage. Please review.

Project coverage is 79.33%. Comparing base (ef44e64) to head (92b10e1). Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/openapi-ts/src/generate/types.ts	93.93%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1177 +/- ## ========================================== + Coverage 79.29% 79.33% +0.04% ========================================== Files 117 117 Lines 15735 15781 +46 Branches 1655 1669 +14 ========================================== + Hits 12477 12520 +43 - Misses 3255 3258 +3 Partials 3 3 ``` | [Flag](https://app.codecov.io/gh/hey-api/openapi-ts/pull/1177/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=hey-api) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/hey-api/openapi-ts/pull/1177/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=hey-api) | `79.33% <96.15%> (+0.04%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=hey-api#carryforward-flags-in-the-pull-request-comment) to find out more.

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commit: 92b10e1