Rebrand: OpenMAIC → MultiMind Classroom — rename in all source, DB name, cookie name, zip extension, prompts, docs, skills

Add comprehensive Frontend section to PROMPT.md — full component catalog (203 files), page layouts, 15 hooks, 32 shadcn/ui primitives, CSS system, animations, 13 config files, one-shot and multi-shot MeDo frontend prompts

Add comprehensive Frontend section to PROMPT.md — full component catalog, page layouts, hooks, CSS, animations, config files, one-shot and multi-shot MeDo frontend prompts

Add comprehensive MeDo-styled prompt document for recreating the full project