Implement BigInt support for REST client

[Rendez]

caused by qdrant/qdrant#3669
relates to qdrant/openapi-typescript-fetch#6
casually closes #48

Add support for BigInt on REST client via @qdrant/[email protected]. Also pins dependencies to prevent dep updates from breaking a working version.

Though previous versions point to @qdrant/openapi-typescript-fetch@^1.2.1 and will receive the dependency update, this PR formalizes support in our SDK. It also adds correct TS typings.

TypeScript types for REST

The generator isn't generating bigint types by itself, see: openapi-ts/openapi-typescript#1439

WIP (todo)

• Generate correct types for bigint with transform option: https://openapi-ts.pages.dev/6.x/node#options

[IvanPleshkov]

I don't have any concerns but some questions from non-TS developer =)

[Rendez]

In order to finalise this PR, we have to generate new TS types that include bigint | number where relevant. For that we need to fix the OAS definitions which will affect the C-Sharp and Python clients. Perhaps it won't break anything, but that's the next step, to check.