Fix Full-stack type safety type names

[sodic]

#1544 bumped the version of Prisma from 4.12 to 4.16.

This change introduced a regression in our full-stack type safety DX. The functionality is still there, but type names are far less ergonomic.

We should do our best to find a way to again show meaningful type names again, and also address other potential changes between Prisma 4.12 and 4.16.

Before

After

[infomiho]

This will most likely be solved by upgrading to Prisma 5.X according to this fix: https://github.com/prisma/prisma/pull/20319

[infomiho]

One extra thing to consider when we solve this: Prisma started branding their model types so our branded _Entity types are no longer needed.

[sodic]

Also related: generating variations of Prisma entity types: https://discord.com/channels/686873244791210014/1246062324792557638/1246062324792557638