Implement user moderation inside MoodleNet

[moodler]

Rough steps:

1. @annakrassa starts with a sample interface of the best way based on her experience
2. @brumasribera refines the interface for a module in MoodleNet (Find designs here)
3. @aleclofabbro implements

[aleclofabbro]

for properly design and discuss let's keep in mind that :

1. User publishing permission editing is currently available as a core functionality in User-Menu->Admin->User
2. The current user approval request workflow (aka create 5 resources to request publishing permission) baked by Jira is implemented in an additional package, to avoid leaking a moodle.net specific use-case into the software core

[moodler]

Anna's first https://docs.google.com/drawings/d/1HxWBC0tgC7cJozrDIkiBNPH5f1sAqVrk0ByFHG9PFVU/edit

[moodler]

@brumasribera can you link your designs here?

[annakrassa]

Hi team,

Here is a suggestion for the Auto-approval flow .

Do note that in this flow I have assumed the implementation of whistleblowing... oups! Well, we'll need to make a small adjustment at the email wording, I just had in my mind the whole concept.

Reminder: After implementing the Auto-approval flow and the Red-flag process, we need to recalculate / adjust the gamification system.

[aleclofabbro]

closing in favor of #62 , as base user moderation have been implemented in #61