Add support for multiple-file prisma schema

[phyrasaur]

Issue: My models are in separate files from schema.prisma
I am using Prisma's new feature where we can separate models to different files for better organisation. When I open the visualizer on prisma.schema I got an empty view. When I open the visualizer on a specific model.prisma, I get just the table for that model

Request: View all tables on prisma.schema
I want to view all models from all files in schema folder when I open the visualizer from prisma.schema

References
Multi-file Schema | Prisma Docs

[togo01]

I tried adding this feature and submitted a Pull Request.

#76

[BOCOVO]

Thank you, @togo01, for the PR. I'll check it out during the week.