Add DebuggerDisplayAttribute to CustomResourceSnapshot Collections

[afscrome]

Description

Adds debugger display attributes to collection types in CustomResourceSnapshot.
This makes it easier to view the resource event snapshots in the debugger.

Before:

After:

The above screenshots were produces with the following code:

var builder = DistributedApplication.CreateBuilder(args);

var other = builder.AddExecutable("other", "cmd.exe", ".");

var redis = builder.AddRedis("redis")
    .WithDataVolume()
    .WithBindMount("c:\\temp", "/mnt/tmp")
    .WithRelationship(other.Resource, "Relationship Type");

builder.Eventing.Subscribe<ResourceReadyEvent>(redis.Resource, (evt, ct) =>
{
    var _ = Task.Run(async () =>
    {
        await foreach (var resourceEvent in evt.Services.GetRequiredService<ResourceNotificationService>().WatchAsync(ct))
        {
            if (resourceEvent.Resource.Name == "redis")
            {
                // Set Breakpoint Here
            }
        }
    }, ct);

    return Task.CompletedTask;
});

builder.Build().Run();

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
    • Is this introducing a breaking change?
      • Yes
        • Link to aspire-docs issue (please use this breaking-change template):
      • No
        • Link to aspire-docs issue (please use this doc-idea template):
  • No

Microsoft Reviewers: Open in CodeFlow

[afscrome]

Hi @JamesNK is there anything more I need to do to get this mergeable?