- rename methods from loadSkills to loadCompositeSkills
- add loadCompositeSkillsOfProvider(name)
- Remove deleted skills from load

- formatting, cleanup
- moved update skill into FluxioSkill
- implemented core mutex functionality
- improved return value and error handling
- added armarx warning messages
- store root profile defaults as stringified json in fluxio values

Co-authored-by: Benedikt Engel <uyqhv@students.kit.edu>
Co-authored-by: Julian Tusch <urhrf@student.kit.edu>
Co-authored-by: Peter Albrecht <usnlf@student.kit.edu>

(co-authored: ughlu@student.kit.edu)

finished implementation of updated skill api. Works with example skill provider. Needs testing of specialized skills and refactoring of remaining skills.