Support Gosund SW2 Dimmer

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

I own quite a few of the Gosund SW2 Dimmers and I flashed them a long time ago with Tasmota, and now would like to get all of my devices running ESPHome.

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

I found this repository for the Gosund SW2 dimmers but it seems it is a bit dated and does not compile in its current form:
https://github.com/a-lost-shadow/gosund-sw2/tree/master

I would love for someone to help and update this and integrate it into ESP Home so I can convert my dimmers to ESPHome

**Additional context**

I would be happy to contribute to the project if a link can be provided.

Start by reviewing the linked Gosund SW2 repository and determine why its current form does not compile. Then identify the ESPHome integration entry points needed for this device; done means Gosund SW2 dimmers can be built and run with ESPHome.

Written by the indexing model from the issue text.