Add type hints to entity grid

[dpalmasan]

The entity grid module can be found in the following source:

https://github.com/dpalmasan/TRUNAJOD2.0/blob/master/src/TRUNAJOD/entity_grid.py

For example, the function:

def get_local_coherence(egrid):

Could be defined as:

def get_local_coherence(egrid: EntityGrid) -> Tuple[float, float, float, float, float]:

[supersonic1999]

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