Adds a new `replit.md` file containing comprehensive documentation for the ThrillWiki project, outlining its overview, tech stack, system architecture (frontend, backend, image management), and user preferences.
Replit-Commit-Author: Agent
Replit-Commit-Session-Id: f44f1d1b-1dd8-407b-8603-db12902e1a15
Replit-Commit-Checkpoint-Type: full_checkpoint
