Allow to manage the WordList protection word list from the management room

**Is your feature request related to a problem? Please describe.**
When running the bot it is inconvenient to have to access the server and edit the configuration file to add or remove words to the WordList list.

It is even more inconvenient if the bot is run for someone else and this person has to contact the admin to modify the list.

**Describe the solution you'd like**
Ideally, there would be commands in the management room to list, add and remove words to the WordList list.

Something like:

!mjolnir WordList list
!mjolnir WordList add "whatever"
!mjolnir WordList remove x (x being the number of the item to be removed from the list as showed by list command)

This is just a suggestion for the commands.

**Describe alternatives you've considered**

**Additional context**

Start by locating the management-room command handling and the WordList protection configuration. Define how list, add, and remove should behave, including removal by the displayed item number, then verify the commands in a Matrix management room.

Written by the indexing model from the issue text.