Create MongoDB connection utility with caching and pooling

Merge pull request #1 from silassdev/main

Merge pull request #1 from silassdev/silassdev-patch-1

Add README.md for Automated Prompt Engineering Hub

Create package.json for Next.js 15, NextAuth.js, MongoDB driver, and required dependencies.

Add tsconfig.json for Next.js TypeScript configuration

Create .env.local.example file with environment variables template for NextAuth, MongoDB, and LLM APIs