Add release workflow permissions

[Copilot]

The release workflow was missing required permissions to create tags and releases.

Changes

• Added contents: write permission - Required by softprops/action-gh-release@v2 to create tags and releases

The workflow now properly:

• Detects version changes by comparing HEAD^ to HEAD
• Validates version consistency across plugin header and constant (logs warning if mismatch detected)
• Creates tagged releases with auto-generated notes and zip artifacts
• Skips release creation steps when no version change is detected or when versions are mismatched

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[alecgeatches]

@copilot Because all following steps have a if: steps.version_check.outputs.new_version check, we don't need to exit 1 in a particular failure case.

[Copilot]

@copilot Because all following steps have a if: steps.version_check.outputs.new_version check, we don't need to exit 1 in a particular failure case.

You're right - removed the exit 1 since the conditional checks on subsequent steps will prevent them from running anyway. The version mismatch will still be logged but won't fail the workflow. Fixed in commit 1c127a1.