feat: Add Cloudwatch group output

[wanis-fahmy]

Description

This PR exposes the cloudwatch group name as an output so it can be referenced elsewhere in other resources.

Related Issues

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
• 🔧 Configuration change
• ♻️ Code refactoring
• ⚡ Performance improvement
• ✅ Test addition or update
• 🔒 Security improvement

Changes Made

Testing

# Example configuration used for testing

Breaking Changes

Screenshots / Examples

Checklist

• Updated README.md (or documentation auto-generated via terraform-docs)
• Updated relevant or added new example configurations
• Added/updated comments in code where necessary
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• My commit messages follow the Conventional Commits specification

Additional Notes

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By submitting this pull request, I confirm that my contribution is made under the terms of the project's license.