In context of https://git.h2t.iar.kit.edu/sw/armarx-integration/robots/armar7/documentation/-/issues/85

Ice

added utility to run subskills from within a skill so that automatically onStopRequested and onTimeoutReached are called. Skill Proxy has been moved to core package of skills.

split example skills in seperate files

remove getLatesNUpdates from skillsMemory interface as the same behavior can be reached through getSkillStatusUpdates(). Added methods to coreSegment.

added skillExecutionRequest to memory when skill is asyncronolously called

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

update to skills. Allows skills to run concurrently. Refactoring of full skills framework. Allows skill to get "prepared", i.e. wait for input

changes due to armarx::variant usage internally in aron. Updated defaults in aron as they were not optional. Switched to ADL and SFINAE for aron codegen and eigen types.

This reverts commit 18db5c8a.