Descriptive names for subscriptions

[mmclane]

Checklist

• I've searched the issue queue to verify this is not a duplicate feature request.
• I've pasted the output of kargo version, if applicable.
• I've pasted logs, if applicable.

Proposed Feature

I would like to be able to give a name to subscriptions in a warehouse.
Today it look like this:

Motivation

This would allow them to be more descriptive and make more sense for none-technical folks.

Suggested Implementation

[krancour]

I agree. fwiw, it's the way it is because every Warehouse and Stage is a Kubernetes resource, which all naturally have names. Subscriptions are just details of a Warehouse, so they do not. Adding an optional name field seems like it would be a nice convenience. Thank you for this suggestion!