Add CLI command to remove notifications from an announcement

[mwinkens]

closes #839

Help

$ php occ announcementcenter:remove-notifications --help
Description:
  Remove notifications of announcement by id

Usage:
  announcementcenter:remove-notifications <id>

Arguments:
  id                    Id of announcement to remove notifications from

Options:
  -h, --help            Display help for the given command. When no command is given display help for the list command
  -q, --quiet           Do not output any message
  -V, --version         Display this application version
      --ansi|--no-ansi  Force (or disable --no-ansi) ANSI output
  -n, --no-interaction  Do not ask any interactive question
      --no-warnings     Skip global warnings, show command output only
  -v|vv|vvv, --verbose  Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug

Guide

• list announcements:

$ php occ announcementcenter:list
ID  |Subject                 |Message                                           
----|------------------------|--------------------------------------------------
70  |test21                  |test21                                            
69  |test20                  |test20 linebreak                                  
68  |test19                  |test19                                            
60  |test17                  |test17                                            
59  |test16                  |test16                                            
58  |test15                  |test15                                            
57  |test14                  |test14                                            
56  |test13                  |test13                                            
55  |test12                  |test12                                            
51  |test9                   |test9                                             
And more ...

• remove notifications by ID:

$ php occ announcementcenter:remove-notifications 70
Successfully removed notifications from accouncement #70

Roadmap

• Tests
• Manual tests

[mwinkens]

I guess I can never do this first try, maybe I should add a githook for some local tests before committing

[mwinkens]

@nickvergessen this is ready for review 🎉

Here a joke for the weekend: I wrote this code first try and it worked immediately, but I needed 5 tries until the linter was happy!

Edit: and maybe one day I'll be able to properly type 'notifications' and 'announcements'