Split Tasks to Tasks and PlannedTasks

[ISibboI]

A planned task is the desire to do something, while a task is the technical realisation of doing something.
A planned task is a meta goal, like walk home, or get food, while a task is an algorithm for doing such thing from a specific state, like walk from P to Q.
Thus, a planned task has for example a priority and lives longer, while a task just lives while it is executed. Hence, it doesn't need a priority.

Maybe there is a better wording than task and planned task.

[ISibboI]

Also, remove composite task, add option to add list of tasks to TaskExecutingAI, as aborting one task will lead to aborting all tasks anyway.

[ISibboI]

Call planned tasks intends.

[ISibboI]

Implemented. Feels much better now.