Add Slack Mode Comic Visualization and Enhanced Documentation

[neerazz]

Summary

This PR adds a futuristic Slack mode comic strip visualization and enhances the documentation to better support Slack messaging alongside the existing phone call functionality.

Changes

• Added futuristic-slack-comic.png: A visually engaging comic strip that illustrates the Slack Mode feature, depicting Claude's interaction with users through Slack DMs
• Enhanced README.md:
  • Updated the Slack Mode section with the new comic visualization
  • Improved documentation clarity for Slack messaging setup
  • Added visual examples for better user onboarding
  • Updated tool descriptions for Slack Mode operations
• Updated server configuration: Enhanced support for Slack messaging with proper environment variables and better error handling
• Added environment template: New env-template.txt for easier setup configuration
• Updated package dependencies: Minor version updates for better compatibility

Features Highlighted in Comic

The comic illustrates:

1. Claude Code completing a task and initiating a Slack message
2. Real-time communication flow through Socket Mode (no ngrok needed)
3. Multi-turn conversation capabilities
4. User interaction response through Slack DM interface

Slack Mode Benefits

• 🎯 Free to use (no external API costs)
• ⚡ 2-minute setup time
• 📱 Works on any device with Slack installed
• 💬 Perfect for text-based communication and code snippets
• 🔄 Bi-directional messaging without webhooks

Type of Change

• New feature (non-breaking change which adds functionality)
• Documentation enhancement
• Asset addition (comic visualization)

Related Issues

Part of the effort to enhance the Slack Mode user experience and onboarding process.

Testing Done

• Verified comic asset is properly displayed in README
• Tested Slack Mode environment variable configuration
• Confirmed documentation clarity and accuracy
• Validated that the comic adds clear visual context to the Slack Mode feature

[neerazz]

@ZeframLou Please review it.