add wiki doc on how to manually add a new hosttag [ or add a add_hosttags() ] function

[TheBigBear]

I am not a python programmer, ( which is why I choose to use a api middleware ) could you please consider either documenting how one would use the get_hosttags() and subsequent set_hosttags() functions step by step for adding a new hosttag using python?

Would be even nicer if the check-mk-web-api could even do this all internally and expose a simple add_hosttags() function.

Thanks for any hints and help in this direction.