Memory Tour

Show the user what Mem0 has stored — a full walkthrough of all memories grouped by category.

Cross-project mode

When invoked with --all-projects (e.g., /mem0-tour --all-projects), search across ALL projects:

1. Use mem0_memory tool with action="get_all", scope="global" — no project filter.
2. Group results by project first, then by category within each project.
3. Display:

   ## <project_1> (<N> memories) <- current
   **Goals** — <memory content>
   ...
   
   ## <project_2> (<N> memories)
   ...