[Feature] Implement cli.sh init command with environment checks and directory setup

[iSuperCoder]

Description

Implement the cli.sh init command to initialize a JitAI development workspace. The command should perform environment validation before setting up the workspace structure.

Requirements

1. Environment Checks

Before proceeding with initialization, verify:

• Python Environment:

  • Python >= 3.12 is installed and accessible
  • Required Python packages can be installed
  • Virtual environment can be created

• Node.js Environment:

  • Node.js >= 20 is installed and accessible
  • npm/yarn is available
  • Can install required packages

2. Directory Construction

After successful environment checks:

• Create the jitai-workspace directory structure
• Copy template files from the repository
• Download required directory files:
  • system/bin/builder
  • system/bin/jitnode
• Download framework applications as needed
• Set up configuration files with default values
• Initialize Python virtual environment
• Install initial dependencies

3. Error Handling

• Provide clear error messages if environment checks fail
• Suggest remediation steps for common issues

4. Output

• Display progress during initialization
• Show summary of what was installed/configured
• Provide next steps for the developer

Acceptance Criteria

• Environment checks pass on clean systems with Python and Node.js
• Directory structure is created correctly
• All required components are downloaded
• Clear error messages for missing dependencies
• Command completes successfully and workspace is ready for development

Technical Notes

• Consider using a configuration file to specify download URLs and versions
• Implement retry logic for network downloads