fix(cli, go): Fix go local github generation to match remote generation

[jsklan]

Description

This PR fixes a mismatch between local and remote Go SDK generation by ensuring the CLI can properly retrieve the package name from module.path configuration during local generation workflows. Previously, local generation was failing because the package name couldn't be extracted from the generator configuration, while remote generation (via Fiddle) worked correctly.

Changes Made

• CLI package name extraction: Added support for reading module.path from Go generator config in local workspace runner
• Version normalization: Go generator now adds 'v' prefix to version strings following Go conventions
• Custom license file support: Go v2 generator now copies custom LICENSE files during local generation (remote generation handled by Fiddle)

Testing

• Manual testing completed with local generation
• Verified version normalization with/without 'v' prefix
• Tested custom license file copying in local generation environment