added an exception, in case the command was missing the correct types of parameters (channel is required, no channel was found)
added fix text to exception handler, in case the message of an exception is null
fixed off-by-one error when searching the missing parameter
changed supported chanel from guildChannel to textChannel for posttarget
added slowmode command
changed command context to be a member instead of user, commands are only supported within guilds
added custom exception templating for the error message
added error message in case the parameters for a command were too little
added support for templates on command help descriptions
added post execution to be executed to print exception messages
refactored command handling to be able to support exceptions
added user and userInServer management
