Add Nui, a UI for NATS

[Mrxx99]

Description

Adds the NATS managment UI called Nui. It seems to be the only managment UI for NATS that is actively maintained (at least what I could find).
https://github.com/nats-nui/nui
https://natsnui.app/

The implementation is inspired by PgAdmin/PgWeb and RedisInsights implementation.

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: todo
  • No

Microsoft Reviewers: Open in CodeFlow

[Mrxx99]

this has to updated, after #6259 was merged, so changing to draft for now

[danmoseley]

@Mrxx99 #6259 has merged now, are you able to update this PR and make un-draft?

[Mrxx99]

Yes, will try to finish this this week