Add bump-version workflow

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[Copilot]

Pull Request Overview

This PR enhances the automated version bump process and adds a dedicated release workflow.

• Updates the version-bump action to only stage package.json
• Introduces a release.yml workflow to tag and publish releases on merged version-bump PRs

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.github/workflows/version-bump.yml	Removed package-lock.json from staged files
.github/workflows/release.yml	Added new release workflow to tag and create releases

Comments suppressed due to low confidence (1)

.github/workflows/version-bump.yml:40

• The removal of package-lock.json from the git add step means lockfile changes won’t be committed after the version bump, which can lead to mismatched dependencies. Add UnityNaturalMCPServer/package-lock.json back into the staging command to keep package.json and its lockfile in sync.

          git add UnityNaturalMCPServer/package.json