Add support for Haxxair AC remote model DG11J1-72 in IR Remote Climate

**Describe the problem you have/What new integration you would like**

Control Haxxair AC with IR Remote Climate - remote model DG11J1-72

**Please describe your use case for this integration and alternatives you've tried:**

Haxxair split head AC unit seems to use a similar remote to the ones listed under whirlpool. Remote model DG11J1-72

This unit is at another location so I have not yet tested any of the existing whirlpool remote options or Arduino-HeatpumpIR.

**Additional context**

You guys rock!

Start with this feature request and inspect the existing Whirlpool remote options and Arduino-HeatpumpIR support mentioned in the body. Confirm the DG11J1-72 protocol and test access to the Haxxair unit before choosing an implementation path; done means the IR Remote Climate integration can control this model reliably.

Written by the indexing model from the issue text.