Make connections in experiment cell space named #2060 #features

[Abhijit1102]

The proposed feature resolves the limitation in the current representation of cell connections. By replacing the existing list of connections with a dictionary containing named connections, the code enables more expressive and flexible movement over the cell space. Specifically, this change allows for easy retrieval of neighboring cells in different directions, such as left, right, top, or bottom in the context of a von Neumann grid. The enhanced structure opens the door to straightforward expression of various movements and relationships within the cell space.

self.connections: dict[str, Cell] = {}

[EwoutH]

Thanks for the PR! I assume this is still a work in process? If so, could you mark the PR as draft?

When finished, this should close #2060 right?

[quaquel]

As indicated in #2060, the real issue is with OrthogonalMooreGrid, OrthogonalVonNeumannGrid, and HexGrid and specifically in _connect_single_cell2d, assuming we first address this for 2-dimensional grids. This PR, so far, does not address the code there (which is also, in part, why the builds are failing).

[quaquel]

the choice to keep connections "private" was deliberate because many of the inner workings of discrete space classes rely on it. So, I would not change it here unless there are good reasons for it.

[Corvince]

Honestly this PR looks very much AI-generated. Sorry if I am wrong about this @Abhijit1102 , but if there isn't any further progress soon I will close this PR (but feel free to open another one if this was a genuine first version)