7 segment clock by random1101 for ESPHome

This is the electronics remix for the [7 segment clock made by random1101](https://www.thingiverse.com/thing:3437127).
It uses the ESP-01s for everything.
Once it connected to the Home Assistant it may be controlled over the entity card. It supports separate color, brightness and on/off for hours, minutes and colon parts of the clock. Current time is synchronized with SNTP servers. Note: if you prefer to use static IP it's important to configure at least 1 DNS server in a WIFI section of the config (in my case I use the IP of my router).

_WARNING_ There're 2 modifications of ESP-01: one has 1MB of flash memory and one with only 512kb. The firmware compiled from this configuration takes about 36kb of RAM and 404.5kb of Flash memory. If you have a 512kb there will be no room for the firmware for OTA updates.

Electronics BOM:
1) ESP-01s
2) 5v to 3.3v downshifter to power ESP-01s [like this](https://aliexpress.ru/item/32555282571.html?spm=a2g0s.9042311.0.0.46f933edNvOZb6&_ga=2.17