[DOC] Classifier docs tidy up

[TonyBagnall]

tidy up some of the docstrings in base classifier and some other minor things:

1. removing explicit reference to mtype/stype in comments see [DOC] remove references to mtype/machine type scitype/stype #42
2. refactor names to remove the term boilerplate, which has negative connotations
3. change attributes set in fit from "parameters" to "attributes"
4. try formatting code in comments, not done it all to see if it works first
5. add _estimator_type to attributes
6. Also removed verbose from EE, not on topic, sorry, but it fails pre-commit
7. fixes [BUG] B028 No explicit stacklevel keyword argument found.  #67

[patrickzib]

Didn't go through all changes. More of a general question, if we want to replace sktime with scikit-time.

[TonyBagnall]

Didn't go through all changes. More of a general question, if we want to replace sktime with scikit-time.

I guess we do replace as we find it?

[TonyBagnall]

regarding notebooks, we need a proper look at the structure, I'm just triaging here

[patrickzib]

I guess, the exclude should be with TEASER, not WEASEL. Even more so, as the failong test is woth TEASER+Catch22

[GuzalBulatova]

Thanks a lot, looks very good to me! Have some minor suggestions/questions, none of them is really a blocker.