Rename cat/mad_hatter/core_plugin/settings.py

[nicola-corbellini]

Is your feature request related to a problem? Please describe.
Similar to #633, there are two files named settings.py in the cat's folder.
The first one is related to the /settings endpoints and the second one is about the plugin's settings.
Because of the not very sophisticated scanning mechanism in the documentation, both end up documented, but only the second one should.

Describe the solution you'd like
Since in the second one stores @plugin hooks, what about renaming it something else? E.g. events.py or plugin_events.py or something else

[NJacksonDev]

Hi, happy to work on this. Could you please assign this to me?

[nicola-corbellini]

@NJacksonDev done! Let's go with plugin_events.py name please. Thank you!