Prisma seed script

[ketankauntia]

Actually, we don’t currently have a Prisma seed script configured, so npx prisma db seed won’t populate organizations yet.

[SainiAdi-04]

I have created a Prisma seed script for the project that populates the database with example records for organizations, projects, and waitlist entries using idempotent upsert operations.

During setup, I encountered and resolved a few configuration-related issues:

• The tsx package was not installed, which is required to execute the TypeScript seed file.
• Prisma does not automatically load environment variables from .env.local, so the configuration was moved to a .env file.

After addressing these points, the seed now runs successfully using pnpm prisma db seed.