Goodwe

Configuration UI hotfix

Fix integration setup - migration from previous config.

Add support for handling fragmented responses.
Expose all parameters to configuration UI.
Add "keep alive" config.
Add support for reading/writing generic modbus register (setting).
Fix writing single byte settings on ES inverters.
Fix decoding 0 energy values.

Fix connection to BT inverters.
Fix setup of TCP mode.
Add timeout to TCP create_connection.
Fix SELF_USE mode on ES G2.

Major rewrite of the communication protocol.
Besides existing Goodwe's Modbus/RTU over UDP, standard Modbus/TCP is now supported too (e.g. Wifi/LAN kit 20).

272 Fix max value of grid_export_limit - either 10000, or 2* inverter rated power (if known).
HA 115837 Fix N/A energy/power values on DT inverters.
Implement async_update so settings values can be reloaded by homeassistant.update_entity service

Improve Eco Modes handling on ETT (platform 745).
Add Peak Shavig limit and SoC settings.
Improve platform detection (205 vs 745).
Fix sensors decoding on large inverters (singed vs unsigned).