Remove Prisma from project

- Remove @prisma/client and prisma dependencies
- Delete prisma schema and database files
- Remove database context from tRPC
- Clean up Prisma-related scripts and environment variables
- Update README to remove Prisma reference

The project no longer requires a database and builds successfully.

README.md

@@ -119,7 +119,6 @@ PVESciptslocal/
 │   │   └── page.tsx          # Main page
 │   └── server/               # Server-side code
 │       └── services/         # Business logic services
-├── prisma/                   # Database schema
 ├── public/                   # Static assets
 ├── server.js                 # Main server file
 └── package.json              # Dependencies and scripts