fix: export type RequestResult of fetch client

[lsdch]

fixes incomplete PR #698
fixes #693
changeset was already added in #698, please LMK if I should generate another one

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[changeset-bot]

🦋 Changeset detected

Latest commit: aa661a1

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

This PR includes changesets to release 2 packages

Name	Type
@hey-api/client-fetch	Patch
@example/openapi-ts-fetch	Patch

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Name	Status	Preview	Comments	Updated (UTC)
hey-api-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 20, 2024 2:25pm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.89%. Comparing base (a9dfda0) to head (aa661a1).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #700   +/-   ##
=======================================
  Coverage   70.89%   70.89%           
=======================================
  Files          76       76           
  Lines        7984     7984           
  Branches      696      696           
=======================================
  Hits         5660     5660           
  Misses       2321     2321           
  Partials        3        3           

Flag	Coverage Δ
unittests	70.89% <ø> (ø)

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