Add Prisma Postinstall Command

[Riya267]

Summary:
Automate Prisma Client generation by adding prisma generate to the postinstall script in package.json. This will ensure the client is always up to date after dependencies are installed.

Current Behavior:
Manual prisma generate is required after installing dependencies.

Expected Behavior:
Prisma Client is automatically regenerated after npm install or yarn install.

Solution:
Add prisma generate to the postinstall script in package.json.

Note
For more details on Prisma Client generation, refer to the Prisma documentation.