[FIX] Use interface & class inheritance for Accessories to make this clearer

[johannrichard]

• Move DingzDaBaseAccessory to an interface
• Extend a BaseAccessory class with this interface
• Acceossories implement the interface

See Interfaces extending classes for details.

homebridge-dingz/src/lib/dingzDaBaseAccessory.ts

Line 17 in 5f70bb5

retryDelay: axiosRetry.exponentialDelay,