v0.86.0: /context slash command, automation sharing and forking, OS-level sandboxing, and terminal fixes

New features

- /context slash command - New /context command shows a breakdown of token usage in your current session
- OS-level sandboxing - Added OS-level sandboxing for enhanced security when running CLI tools

Improvements

- Ask question tool redesign - Redesigned the Ask Question tool with improved text wrapping and layout

Bug fixes

- Kitty terminal keypad keys - Fixed keypad keys not working correctly in Kitty terminal
- Slack DM reliability - Fixed bot message feedback loops in Slack DMs