Frame with labels

[thibo73800]

In this merge request:

• Frame can now use Labels

@LucBourrat1 This can be usefull to attached a class to a Frame.

Here is an example of how to use one one frame:

frame = aloscene.Frame(np.random.uniform(0, 1, (3, 600, 600)), names=("C", "H", "W"))
label = aloscene.Labels([1], encoding="id")
frame.append_labels(label)