Change license from GNU GPL to MIT License

[javaquery]

Description

Replaced GNU GPL with MIT License and updated copyright notice.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)

Related Issue

Fixes #

Checklist

General

• My code follows the project's coding style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings

Testing

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (go test ./...)

Release (for version updates)

• Version updated in pkg/version/version.go
• CHANGELOG.md updated with new version entry
• README.md updated (if applicable)

Additional Notes