Create kogan_kasmgphXXXX_heater.yaml
Add support for the white 1.5kw Kogan Smarterhome KASMGPH15YA. This is tested and working on KASMGPH15YA.
While I have not tested, since the user guide appears to be the same for all the series, this would likely work with all KASMGPH series heaters. E.g.
1.5kw - KASMGPH15YA (White) and KASMGPH15YB (Black)
2.0kw - KASMGPH20YA (White) and KASMGPH20YB (Black)
2.4kw - KASMGPH24YA (White) and KASMGPH24YB (Black)