Add support for 4th fan speed in izone A/C systems (#51969)

* Add TOP fan speed

My a/c is 4 speed and the top speed is reported as top or boost. 

i.e it supports: low med high boost auto

* add support for top fan speed

Aircons with 4 fan speeds. i.e low, med, high, top/boost

* Update manifest.json

Bump version to 1.1.5

* Update climate.py

* Bump Izone to 1.1.5

* Update climate.py

* fix isort failure

* Use v1.1.6

Co-authored-by: Penny Wood <Swamp-Ig@users.noreply.github.com>
Co-authored-by: Swamp-Ig <github@ninjateaparty.com>

homeassistant/components/climate/const.py

@@ -63,6 +63,7 @@ FAN_AUTO = "auto"
 FAN_LOW = "low"
 FAN_MEDIUM = "medium"
 FAN_HIGH = "high"
+FAN_TOP = "top"
 FAN_MIDDLE = "middle"
 FAN_FOCUS = "focus"
 FAN_DIFFUSE = "diffuse"