Groove Admin Config

This is the interactive configurator for the Groove task and memory management system. It walks you through setting up `.groove/index.md` by prompting for your task backend (beans, linear, github, or none), list limits, memory review settings, and git strategies for what gets committed versus staying local. The git strategy piece is genuinely thoughtful: you can ignore all memory logs, use a hybrid approach that commits logs but not sessions, or commit everything. It handles both fresh setups and updates to existing configs, supports a `--defaults` flag for zero-prompt installation, and generates the appropriate `.gitignore` rules automatically. Run this before `groove-admin-install` to get your environment configured the way you actually work.