Addition of top-level concepts

[nmoust]

This PR includes the addition of the top-level concepts and their definitions.

ID	Concept	Definition
180	physical entity	Entity with a concrete and physical nature.
181	non-temporal abstract entity	Any entity that cannot be located in space-time. E.g., mathematical entities, formal semantics elements, regions within dimensional spaces, ideas, models.
182	temporal abstract entity	Anything that has a temporal dimension, whether it is an instantaneous point in time, a duration, or a sequence of events.
183	events	An occurence or happening, marked by a specific point in time. Events can be observed, recorded, and may have an impact on the state of the system or entities involved.
184	actions	Temporal entities that have a duration and occur at specific points in time.
185	processes	A series of temporal entities, like actions, events, changes, or functions that are not isolated by rather a connected sequence of activities. Processes often involve the transformation of inputs into outputs and can be conceptualized as workflows.
186	attributes	A characteristic of an entity that is intrinsic to and cannot exist without the entity. E.g., properties, characteristics, qualities of things, states.

Concepts 183, 184 and 185 were added as children of concept 182.