create a function that selects hits/pmts within a certain distance from 3D point

After discussing with @tgal, I would propose to include in km3pipe a function like:

point = np.array([x, y, z])

def get_selected_items(point, item, d_min, d_max):

        item_pos = np.array([item.pos_x, item.pos_y, item.pos_z]).T
        distances = kp.math.dist(point, item_pos, axis=1)
        mask = (distances >= d_min) & (distances <= d_max)

        selected_items = item[mask]
  
        return selected_items

where item can be a hit or a pmt. Probably the naming of the function is not optimal.