Rename extension

[vinistock]

The display name Ruby can be confusing and doesn't indicate that this is an extension pack and in fact includes no Ruby related features in its own code (everything comes from the extensions included in the pack).

We tried renaming it #565, but unfortunately the marketplace won't accept a display name change and publishing fails.

We need to investigate if there's a process for renaming the extension. Maybe we have to file a request somewhere.