Feature Request: CUID and Prefixed IDs

### Is your proposal related to a problem?

No

### Describe the solution you'd like

Allow CUID (Collision-resistant ids) to be generated as IDs alongside UUID and regular Int/BigInt IDs.
Also, allow the creation of prefixed IDs per schema. For example, if I have an author schema, I could have a `author_clevcj0g4000008k1gkpk9e6h` as a Id.

### Describe alternatives you've considered

Generating this manually before sending a mutation, but this creates a logic that could be inside Hasura.
Currently Prisma allows CUID natively (through their own ORM) and prefixes can be done via Middleware. But in Hasura it's only possible by messing directly with a query.

The issue does not identify any files, tests, or entry points. Start by locating Hasura's schema ID generation and mutation handling, then determine the required design and validation for CUID generation and schema-level prefixes.

Written by the indexing model from the issue text.