Add new workflow for creating service releases with version bumping

[the1bit]

This pull request refactors and improves the service release workflow by renaming the workflow file, updating step identifiers for clarity, and adding validation and robustness to the release process. The most important changes are grouped below:

Workflow improvements and robustness:

• Added a new step to validate that the specified service folder exists before proceeding, preventing accidental releases for non-existent services.
• Improved tag lookup logic to handle cases where no tags exist yet for a service, ensuring the workflow can safely release new services.

Refactoring and clarity:

• Renamed the workflow file from .github/workflows/new-release-monorepo.yml to .github/workflows/new-service-release.yml for better clarity and alignment with its purpose.
• Updated step IDs and output references from bump_version/make_tag to bump/compose throughout the workflow for consistency and readability. [1] [2]

Documentation improvements:

• Clarified the description for the new_version output to specify the expected format (vX.Y.Z).