feat: added require to load scripts using CommonJs

[JulienLeal]

Proposed changes

Enabled CommonJS require support in GraalJS engine for Maestro flows

• Added GraalJS context configuration with js.commonjs-require and js.commonjs-require-cwd options
• Implemented module resolution relative to the executed YAML file's directory
• Set MAESTRO_YAML_DIR environment variable automatically for script context
• Added validation for module directory existence
• Modified RunScriptCommand to propagate YAML file location context

Testing

Added integration test:

• ✅ Case 121 - CommonJS require functionality
  • Verifies successful module resolution from YAML file directory
  • Tests cross-file require() with JSON serialization
  • Validates console output logging

Manual verification:

1. Tested multi-level directory structures
2. Verified relative path resolution (./lib/utils.js)
3. Checked error handling for missing modules
4. Validated Windows/Linux path compatibility

Issues fixed

• Fixes lack of Node-style module resolution in Maestro JS scripts Importing JS modules (both CJS and ESM) doesn't work in GraalJS #1637 (example)
• Eliminates need for absolute paths in require() statements
• Ensures consistent module resolution base across nested flows