added the concept of a mod mail role, these are roles being pinged when a thread is opened, and they also are able to execute mod mail related commands
fixed past thread count in mod mail header
added convenience method to allow a role to execute a whole feature
added modmail with some simple features (chat between user and moderator), and initial server selection (currently allows all servers, and does not consider the modmail feature)
added the initial commands, not all of them hold logic currently
added some checks to not crash when a command has null configuration
changed systemconfig to also have a long value, because double is not fit for all cases
added locking mechanism, to effectively lock the whole table without using the ... proper locking mechanism (needs to be reviewed)
changed interface in channel service to be a message channel instead of a textChannel
changed starboard post to be a user in a server instead of only user
