fix check for oss.yaml files

[Suselz]

Description

This PR enhances the OSS (Open Source Software) validation in the DMT module linter by adding new required fields and improving error reporting.

Changes Made

1. Enhanced OSS Validation (oss_library.go)

• Added new required fields to oss.yaml validation:
  • id - Project identifier (must not be empty)
  • version - Project version (must not be empty, should be valid semver)
• Improved error handling: Refactored from returning error slices to using the centralized error list system for better error reporting and consistency
• Added semantic versioning validation for version fields using the semver library
• Enhanced error messages with specific object IDs for better debugging

2. Updated Documentation (README.md)

• Expanded OSS validation section with comprehensive field descriptions
• Added complete error message reference documenting all possible validation errors and warnings
• Updated examples to include the new id and version fields
• Added reference to ADR for version field requirements

3. Refactored Tests (oss_library_test.go)

• Complete test rewrite to use the new error list system
• Added comprehensive test cases covering all validation scenarios
• Improved test structure with better organization and coverage

4. Cleanup

• Removed obsolete README (README.md) as it was outdated