Additional components to use esphome with a M5StickC.
Mostly a work in progress.
Copy the components to a custom_components directory next to your .yaml configuration file.

• axp192 : power management - configuration hard coded for the M5StickC - should be made more generic. Must be present to initialize the screen power.
  Can be also used to read some of the power info - most sensors aren't published yet.
  Mostly the AXP192 from M5Stack sample code adapted for esphome.
• st7735 : TFT screen - configuration hard coded for the M5StickC - should be made more generic.
  Adapted from https://github.com/musk95/esphome-1/tree/dev/esphome/components/st7789v + M5StickC sample code for the init