Docs: add GHome Smart Socket EP2-A

**Describe the problem you have/What new integration you would like**
I just purchased "GHome Smart Socket EP2-A". It turns out that it's quite the same as https://devices.esphome.io/devices/BlitzWolf-BW-SHP6 (>2020) with the following differences:
* LEDs are green+blue, not red+blue
* calibration values differ.

What is the bast way to add it to the documentation? Should this be a new device page (duplicating most of the SHP6 docs)? Of is there a better way?

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