refactor: upgrade openapi-typescript to 7.x

[patzick]

Description

Upgrade to openapi-typescript 7.x. Requires still updates or fixes on lib part. Leaving as a draft for now

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[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #1107 will degrade performances by 21.77%

_{Comparing feat/upgrade-openapi-typescript (531e68f) with main (bf0036e)}

Summary

❌ 1 regressions ✅ 8 untouched benchmarks

:warning: Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	feat/upgrade-openapi-typescript	Change
❌	[api-gen][generate] - generate schema command	7.7 s	9.8 s	-21.77%

[patzick]

continued in #1405