introduces variant handling

[kr0ner]

In order to support settings for different heat pump variants, there is now a base config that defines the common parts and a specific yaml for every variant. Specific parts can be moved out of the base and defined for each heat pump. If there are changes required on C++ level, C macros can be used to change the source code dynamically.

ifdef THZ404

// do this

elif THZ5_5_ECO

// do that

else

// do the default

endif

[kr0ner]

@croessi @sg-media-dev please try this out and see if it fits your needs :wink:

[croessi]

Nice! Will add my mappings here as soon as I find some time!

[sg-media-dev]

Works great straight away :-) I have added some changes for my THZ404 #20 Thanks @kr0ner