feat(port): add helix

[elainabialkowski]

Description

This PR:

Adding port for helix-editor.

Assets

Checklist

• [ x] PR description included
• [ x] I've read the documents
• [x ] I've created or commented in an issue related to this port asking to work on it
• [ x] I know I shouldn't change any files in the packages folder manually
• I've added this port at the end of the related category list in the main README
• [ x] I've attached an image to the icon of the app that this port is related to
• [x ] I've attached a screenshot with a good zoom in fullscreen showing this port in action

[daltonmenezes]

@elainabialkowski please, update the icon and banner to:

[daltonmenezes]

@elainabialkowski also, after the requested update, you must run the build by running:

yarn build only helix

and push the result to this PR

[elainabialkowski]

Would you like me to store the images in the repository next to the implementation itself?

[daltonmenezes]

Would you like me to store the images in the repository next to the implementation itself?

No, you can just copy the image links and use it as it is