Home Assistant discovery - add energy counters today/yesterday, add clear date, add friendly names (#1092)

* HASS discovery energy stats fixed except energycounter_clear_date

* HASS: add friendly entity names, remove timestamp class from energycounter_clear_date as workaround for hass-incompatible date format

* HA energycounter_clear_date fixed for correct interpreting as home assistant timestamp sensor

* fix compile on OpenW800 due to OBK_DISABLE_ALL_DRIVERS on that platform

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Co-authored-by: Stefan Smith <stefan064>

src/httpserver/hass.h

@@ -67,9 +67,12 @@ typedef enum {
 	ILLUMINANCE_SENSOR,
 	// dBm unit
 	HASS_RSSI,
+	/// @brief Wh, kWh
 	ENERGY_SENSOR,
 	// hPa
 	PRESSURE_SENSOR,
+	/// @Brief Timestamp Sensor
+	TIMESTAMP_SENSOR,
 
 } ENTITY_TYPE;