Add Interactive Correction Feature to CLI Mode

[bhouston]

Add Interactive Correction Feature to CLI Mode

This PR adds the ability to send corrections to the main agent while it's running, similar to how sub-agents can receive messages via the agentMessage tool.

Features

• Press Ctrl+M during agent execution to pause output and enter correction mode
• Type a correction message and press Enter to send it to the agent
• The agent receives and incorporates the message into its context
• The correction appears as a user message in the conversation
• Output resumes after the correction is sent

Implementation

• Added a new userMessage tool similar to agentMessage for sending messages to the main agent
• Created an interactiveInput utility to handle keyboard input and message sending
• Modified the CLI to initialize and use the interactive input utility
• Added configuration options for enabling interactive corrections
• Updated documentation in README.md

Usage

# Enable interactive corrections during execution
mycoder --interactive "Implement a React component"

Configuration option:

// mycoder.config.js
export default {
  // ... other options
  interactive: true,
}

Testing

Manually tested the feature by:

1. Starting MyCoder with the --interactive flag
2. Pressing Ctrl+M during execution
3. Typing a correction message
4. Verifying the agent received and incorporated the message

Closes #326