Session history management — supercode sessions command

[yashdev9274]

Description

Add a supercode sessions command to list, search, replay, rename, and delete past chat sessions.

Expected Deliverables

• supercode sessions with subcommands: list, show, search, replay, rename, delete
• Interactive mode without arguments opens an interactive picker
• Display session metadata: title, date, model, message count, token usage
• Pagination support for large histories

Why

Users build up sessions over time and need to revisit, organize, or clean up past work.