Add top entities panel to Console

[kschiffer]

Summary

As per the redesign plan, we want to add a panel to the Console overview which shows the user's "top entities".

Current Situation

No such thing in the Console. Entities have to be searched and navigated through the regular entity lists.

Why do we need this? Who uses it, and when?

To assist users in finding relevant entities quickly.

Proposed Implementation

Perspectively, the concept of "top entities" should not be driven by bookmarks alone, but several indicators that make it safe to assume that the respective entity has high relevance for the user. This could be:

• Number of end devices
• Last modified (including added devices, setup webhooks, collaborators, etc)
• Number of visits (in the last 30 days)

For the sake of the MVP, it will be enough though to use bookmarks here only.
As such, we'll need to implement #6936 as a prerequisite first.

The current design can be found here:
https://www.figma.com/file/7pBLWK4tsjoAbyJq2viMAQ/console-redesign?type=design&node-id=1591-9831&mode=design&t=KahtD0FTWntVj2IO-4

This is still missing a couple of states, such as empty states and wrapping behavior in smaller sizes.
@pierrephz please address these.

Contributing

• I can help by doing more research.
• I can help by implementing the feature after the proposal above is approved.
• I can help by testing the feature before it's released.

Code of Conduct

• I agree to follow TTN's Community Code of Conduct.

[kschiffer]

Blocked by #6936