Add prefix Note/Warning to console print

[martinju]

We print a series of "messages" to the console when e.g. a model does not store feature label classes. Either switch to using warning() or prefix the message with something like "Success with note: ..." to clarify to the reader that it completed fine, but that the content of the message should be noted".

[martinju]

This is not fixed for all cases. Reopening. May also consider switching to using rlang::inform() instead of message() to give information in white text instead of red (as for warning/errors).