feat: support required client in SDK using sdk.client = false

[mrlubos]

Closes #1290

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🦋 Changeset detected

Latest commit: 2cbffeb

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

This PR includes changesets to release 15 packages

Name	Type
@hey-api/client-axios	Patch
@hey-api/client-fetch	Patch
@hey-api/client-nuxt	Patch
@hey-api/openapi-ts	Patch
@hey-api/client-next	Patch
@example/openapi-ts-axios	Patch
@example/openapi-ts-fastify	Patch
@example/openapi-ts-fetch	Patch
@example/openapi-ts-sample	Patch
@example/openapi-ts-tanstack-angular-query-experimental	Patch
@example/openapi-ts-tanstack-react-query	Patch
@example/openapi-ts-tanstack-svelte-query	Patch
@example/openapi-ts-tanstack-vue-query	Patch
@example/openapi-ts-nuxt	Patch
@example/openapi-ts-next	Patch

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Name	Status	Preview	Comments	Updated (UTC)
hey-api-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 30, 2025 0:55am

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commit: 2cbffeb