created achievementService and separated some functionality out of achievementResource to make it easier to test and wrote the tests for achievements

disabled button when not logged in, allowed get request for number of likes and has liked for not logged in user

resolved error with fontsawesome that it worked with yarn start but not with mvnw as mvnw uses npm and the package.lock had the wrong fontawesome version but the yarn had

repaired UI display of types and languages as it was again hidden behind the exercise cards on small screens

language search working, format search working, instant search working -> some tests still failing need to check that