refactored various commands and services
optimized code for message embeds
removed emoteUtils completely and moved to service
removed suggestion validation, because its now done via feature config
fixed regex for discord links
changed template to handle the case in which a member which suggested it originally left the server
added suggestion update exception in cases the message to edit, does not qualify as a suggestion
added check to not allow cross server quoting and added test case
refactored mocking for jda objects
refactored some things in experience tracking
changed the paging behaviour for leader board and added check for negative numbers
fixed rank not being correct for further pages
added test-common module to have some common code für tests
fixed command creation
