Started implementing modelling, based on maitl
 Changes to be committed:
	modified:   nixtla/core/annotation/elan.py
	modified:   nixtla/core/tools/model/concurrent_history.py
	modified:   nixtla/core/tools/model/interfaces.py
	modified:   nixtla/core/tools/model/rules.py
	modified:   nixtla/core/tools/model/state.py
	modified:   nixtla/core/tools/model/transition.py
	modified:   nixtla/modelling/channel_based/implementation.py
	modified:   nixtla/res/config.ini
	modified:   nixtla/rulesets/hands_2d_only/located_in.py
	modified:   nixtla/rulesets/hands_2d_only/touches.py