Add a means of restarting a ESPHome device from its dashboard entry, and for Wi-Fi devices display the RSSI

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**Describe the problem you have/What new integration you would like**

I would like to see a restart button or command added to each ESPHome dashboard entry, and for Wi-Fi-connected devices, I would also like to see the RSSI displayed.

**Please describe your use case for this integration and alternatives you've tried:**

When working on the household electrics I often find I have to turn off and reboot an AP. Having a mesh Wi-Fi system, my ESPHome devices will usually connect to one of the remaining nodes but with an inferior signal. When the AP is restored the devices that have switched AP will not automatically reconnect to the best AP as [FR #731](https://github.com/esphome/feature-requests/issues/731) is still pending. This request would provide a simple workaround and would avoid every user having to expose a per-device restart button, create multiple RSSI sensors and build a new dashboard that mirrors the dashboard provided by the ESPHome Add-on.

**Additional context**

The request names no repository files, tests, or implementation entry points. Start by reviewing the ESPHome dashboard entry, the requested restart command and RSSI display, and related feature request FR #731; done would mean defining and implementing both dashboard capabilities with suitable coverage.

Written by the indexing model from the issue text.