fix: improve parseAs handling and cleanup lint issues

[aartisonigra]

Summary

This PR improves getParseAs handling and fixes related type safety issues.

Changes

• improved getParseAs() response parsing logic
• cleaned up unused variable warnings
• fixed empty catch block lint issue
• migrated example scripts from require() to ES module imports
• improved request/response handling consistency
• fixed lint and formatting issues

Testing

• pnpm lint:fix
• pnpm build
• pnpm test

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[changeset-bot]

🦋 Changeset detected

Latest commit: 79cca1c

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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[aartisonigra]

Can you please review my PR?