Add resource relationship to app model

[JamesNK]

Description

This PR adds:

• Relationship annotation and WithRelationship extension method to app model
• WithRelationship calls are in various methods that add or reference resources.
• Relationship field to resource service proto contract
• Relationship field to ResourceViewModel.
• UI to resource details to display References and Back references
• Color to resource name on resources page and resource names in detail's references UI

Checklist

• Is this feature complete?
  • Yes. Ready to ship.
  • No. Follow-up changes expected.
• Are you including unit tests for the changes and scenario tests if relevant?
  • Yes
  • No
• Did you add public API?
  • Yes
    • If yes, did you have an API Review for it?
      • Yes
      • No
    • Did you add <remarks /> and <code /> elements on your triple slash comments?
      • Yes
      • No
  • No
• Does the change make any security assumptions or guarantees?
  • Yes
    • If yes, have you done a threat model and had a security review?
      • Yes
      • No
  • No
• Does the change require an update in our Aspire docs?
  • Yes
    • Link to aspire-docs issue:
  • No

Microsoft Reviewers: Open in CodeFlow

[mitchdenny]

From an app model perspective I am happy with where this is at except for the XML doc comments ;)

[JamesNK]

I think this is ready for folks to review.

@leslierichardson95 @davidfowl UI feedback is welcome on adding colors to resources page. This is the same thing the dashboard does in telemetry pages, i.e. frontend could be assigned a blue color that shows up in various UI including the span waterfall on trace detail.

IMO the colors back it easier to quickly identify resources, but I'm curious whether folks think it makes the resources page too busy.

[mitchdenny]

WellKnownRelationshipTypes constants class?

[mitchdenny]

I think this is looking good. Just a few minor things and a bit of a UX nit:

Why not just hyperlink the resource name?

[JamesNK]

Yeah, it doesn't look that great. However, it's the UI we're using everywell else. Buttons looking a bit ugly is why I've been switching to the action column with ... button.

I'll play around with options later. I don't want to hold this PR up on a new UI design for row links.