Multi-Version SDK Generation POC

[Gvieve]

Description

Enable generation of multiple npm packages from different OpenAPI specification versions (v20111101, v20250224) while maintaining 100% backward compatibility with existing mx-platform-node package.

What's New
Two Testing Workflows::

• test-multi-version.yml - Safe POC validation (no commits, optional GitHub Packages staging)
• generate-multi-version.yml - Production PR creation with version-specific directory generation

Version-Specific Configs:

• config-v20111101.yml → mx-platform-node-v20111101 package
• config-v20250224.yml → mx-platform-node-v20250224 package
• config-latest.yml → mx-platform-node package (backward compatible, maps to v20111101)

Enhanced Scripts:

• version.rb - Now accepts optional config file parameter for version-specific bumping
• clean.rb - Preserves test-output-* directories during cleanup

Architecture
Enables publishing three independent npm packages from one repository.

Testing (After Merge)

# Safe testing without commits
test-multi-version.yml → api_version: "v20111101" / test_level: "generate_only"

# Production PR creation
generate-multi-version.yml → api_version: "v20111101" / version_level: "patch"

Safety
✅ Zero breaking changes - existing workflows and packages unchanged
✅ Workflows must be merged to master before execution
✅ All changes isolated to new files and optional parameters