[Precondition & Code cleanup] Refactoring of Job-Actions

[MarkL4YG]

I would like to refactor some code around job actions before adding code to allow for a "craft" action. This would allow me to add crafting-related code without making the code messy.
I would like to do the following:

• Refactor job actions into multiple classes AbstractAction, BreakAction, FishAction, etc.
• Refactor loading of the job actions
• ~Create CraftItemAction which then should be able to differ between items by ID and specified keys~ Better to do that in a dedicated PR.
• Refactor break, place, ... listeners into custom watcher classes to move the code out of the JobManager

Comments? @Erigitic ?

[MarkL4YG]

Updated the job information display: