`type-fest` and `json-patch` are declared as dev dependencies but are used in typings of public API

[blaugold]

This causes users to encounter errors like these when checking their own code with tsc:

node_modules/contentful-management/dist/typings/plain/entities/concept.d.ts:3:30 - error TS2307: Cannot find module 'json-patch' or its corresponding type declarations.

3 import type { OpPatch } from 'json-patch';
                               ~~~~~~~~~~~~

node_modules/contentful-management/dist/typings/plain/entities/concept.d.ts:4:34 - error TS2307: Cannot find module 'type-fest' or its corresponding type declarations.

4 import type { SetOptional } from 'type-fest';
                                   ~~~~~~~~~~~

[axe312ger]

This will be fixed with #2717 and branch "beta" being released :)