Remove unreliable init command

This PR removes the init command from the CLI tool, as well as the createDefaultConfigFile function that was used to create the initial mycoder.config.js file. The command has proven to be unreliable in practice.

Changes

• Removed the init command from the CLI entry point
• Removed the createDefaultConfigFile function from config.ts
• Deleted the init.ts command file
• Updated the README.md to remove references to the init command

Testing

• All tests pass
• The CLI builds successfully without the init command

Closes #225