Enhance the output of the user command

https://github.com/python-discord/bot/issues/628

https://github.com/python-discord/bot/issues/339

This commit introduces several changes to the output of the `!user`
command for moderation staff. The output for regular users has not
changed.

Changes:

- When issued in a moderation channel, the infraction count of the
  user will now be broken down by type as described in #339. This
  allows moderators to get a quicker overview of someone's history by
  providing more information. The command will display the total
  number of infractions per type, with the number of active
  infractions in parentheses behind it if there are any.

  This change also means that there no longer a need for the `hidden`
  parameter: When issued in a moderation channel, hidden infractions
  are included by default; when issued outside of a mod channel, the
  command will be equal to what a regular user would get.

  In addition to broken-down infraction info, the command now also
  shows information about the nominations of a user when it's issued
  inside of a moderation channel.

- The code has been refactored to smaller units that take care of a
  single action to make unit testing easier. I have included tests
  that cover the command and all of the new helper methods. Tests for
  the other methods/commands in the cog will be added in the specific
  issue calling for tests for this cog (#581)

This commit closes #628 and closes #339

0 files changed, 0 insertions, 0 deletions