Update Publish Action

[DEATHB4DEFEAT]

No description provided.

[Copilot]

Pull request overview

This PR refactors the publish workflow to use configurable variables and secrets instead of hardcoded values, making the workflow more maintainable and reusable. The changes also update naming from "robust"/"Suns" to "engine" to better reflect the current project structure.

• Replaces hardcoded host, username, and key values with GitHub variables and secrets
• Updates naming conventions from "robust-builds" to "engine-builds"
• Updates step name from "Upload files to Suns" to "Upload files to server"

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[Copilot]

The script path references ss14ManifestGenerator but is located in the engineManifestGenerator directory. This naming inconsistency suggests the executable name may not have been updated during the refactoring from "robust"/"ss14" to "engine" naming. Consider renaming the executable to engineManifestGenerator or verifying the correct executable name.

Suggested change

	script: /home/${{ vars.ENGINE_BUILDS_PUSH_USER }}/engineManifestGenerator/bin/Release/net7.0/ss14ManifestGenerator ${{ steps.parse_version.outputs.version }}
	script: /home/${{ vars.ENGINE_BUILDS_PUSH_USER }}/engineManifestGenerator/bin/Release/net7.0/engineManifestGenerator ${{ steps.parse_version.outputs.version }}