When following your recipe, I get the following errors in HA:
Logger: homeassistant.setup
Source: setup.py:278
First occurred: 10:17:43 (1 occurrence)
Last logged: 10:17:43
Setup failed for custom integration 'gree_silent': No setup or config entry setup function defined.
and
Logger: homeassistant.setup
Source: setup.py:372
First occurred: 10:17:43 (1 occurrence)
Last logged: 10:17:43
The 'gree_silent' integration does not support YAML setup, please remove it from your configuration
Any idea maybe?
EDIT: If others make the same mistake: the file name shouldnโt be init.py but __init__ .py (with double underscores before and under the init).