[Request] Provide more information about the radio signal quality

[ituri]

Is your feature request related to a problem? Please describe.

In my quest to find the perfect location for my OpenDTU, I'd like to see some additional information like you see in ahoyDTU. This would help me to place the unit correctly while keeping the transmit power to a minimum.

Describe the solution you'd like

A solution similar to the one in ahoyDTU (c.f. screenshot below).

Describe alternatives you've considered

No response

Additional context

No response

[tbnobody]

Duplicate of #661

[github-actions]

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