Stellenangebote der Uni posten (#148)

* job-offer feature hinzugefügt

* updated disnake, switched joboffers to slashcommand

* move JOBS_URL and STD:FAK to .env

* cahnge all requested changes

* add 'all' as STD_FAK possibility

* update .env.template and info

* fix problem with `all` when STD_FAK!=all

* fix missing Sonderzeichen

* create turnable pages if more than 5 offers

* fix Beständigkeit of outdated joboffers

* create new embed for every five new joboffers

Co-authored-by: dnns01 <git@dnns01.de>