Initial support for vacuums (clean module) (#944)

Adds support for clean module:
- Show current vacuum state
- Start cleaning (all rooms)
- Return to dock
- Pausing & unpausing
- Controlling the fan speed

---------

Co-authored-by: Steven B <51370195+sdb9696@users.noreply.github.com>

kasa/exceptions.py

@@ -127,6 +127,8 @@ class SmartErrorCode(IntEnum):
     DST_ERROR = -2301
     DST_SAVE_ERROR = -2302
 
+    VACUUM_BATTERY_LOW = -3001
+
     SYSTEM_ERROR = -40101
     INVALID_ARGUMENTS = -40209