feat: allow single workflow

[albertodeago]

This enable the action to be used for single workflow/action repositories

In fact, this will enable WIRE to publish itself

[Copilot]

Pull request overview

This PR enables WIRE (Workflow Independent Release Engine) to support single-workflow repositories, allowing the action to be used for projects with a single reusable workflow or action, including WIRE itself.

Key changes:

• Made {name} placeholder optional in tag patterns for single-workflow releases while keeping it required for multiple workflows
• Added comprehensive test coverage for the new single-workflow functionality
• Added automated release workflow to enable WIRE to publish itself

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
workflow-versions.json	Initializes version tracking for WIRE itself at v0.1.0
src/action.ts	Updates validation logic to make {name} placeholder optional for single-workflow releases, moves validation after workflow count determination
test/action.test.ts	Adds comprehensive test coverage for single-workflow tag patterns and ensures multi-workflow validation still requires {name}
action.yaml	Updates input description to clarify that {name} is required only for multiple workflows
README.md	Adds documentation and usage example for single-workflow repositories, updates input table
.github/workflows/release.yaml	Adds automated release workflow demonstrating single-workflow usage with WIRE releasing itself

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