Improve the context of the Prisma Schema conversion's article

[PazYanoverr]

https://docs.amplication.com/getting-started/how-prisma-schema-is-converted-into-entities/

This article talks about DB import, but the context is not so clear, and therefore it may be misleading.
Let's update the doc (maybe the title, and/or emphasize the import context) to make things clearer.