Add comprehensive AI context documentation

- Add .aicontext file with complete project overview
- Include architecture, tech stack, and critical requirements
- Document data flow, component structure, and common tasks
- Provide deployment process and troubleshooting guide
- Add testing workflows and integration notes
- Document JSON schema compatibility with Student Submission app
- Include code style patterns and examples

This context file helps AI assistants understand the codebase
quickly and maintain consistency across development sessions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: AndreKnoesen