[Task]: TEST-001: Setup Testing Infrastructure

[jeromehardaway]

Configure testing environment and create example tests

• Set up test scripts in package.json
• Create test setup helpers and utilities
• Add mock for NextAuth session
• Add mock for Prisma client
• Create example test demonstrating best practices
• Document testing patterns in docs/TESTING.md

Acceptance Criteria:

• ✅ npm test runs successfully
• ✅ Example component test passes
• ✅ Example API route test passes
• ✅ Test coverage report generated
• ✅ Documentation created