Add "open in Elegoo Slicer"

[TheMBeat]

Checklist

🚨 Please review the guidelines for contributing to this repository. 🚨

• Make sure you are making a pull request against our main branch (left side)
• Check that that your branch is up to date with our main.
• Make sure you are requesting to pull a topic/feature/bugfix branch (right side). Don't request your main!
• Check that the tests and code linter both pass.
• If you're a new contributor, please sign our contributor license agreement.

Warnings

• This PR will change existing database contents.
• This PR introduces a breaking change to existing installations.

Summary

Add one more Slicer to the Open in Slicer Feature.

Linked issues

Description of changes

Simple add a new Open-URL

[Floppy]

Thanks very much! Couple of minor additions and it'll be good to go.