feat: add cal_min/cal_max/colorbar_visible reactive props

[manzt]

from ipyniivue_experimental import AnyNiivue, SliceType
# based on https://niivue.github.io/niivue/features/additive.voxels.html

volumes = [
    {   "path": "../images/mni152.nii.gz" },
    {
        "path": "../images/narps-4965_9U7M-hypo1_unthresh.nii.gz",
        "colormap": "red",
        "cal_min": 2,
        "cal_max": 4,
    },
    {
        "path": "../images/narps-4735_50GV-hypo1_unthresh.nii.gz",
        "colormap": "green",
        "cal_min": 2,
        "cal_max": 4,
    },
]
nv = AnyNiivue(
    back_color=(1, 1, 1, 1),
    show_3D_crosshair=True,
    is_colorbar=True,
)
nv.load_volumes(volumes)
nv

import ipywidgets

nv.volumes[0].colorbar_visible = False
sred = ipywidgets.FloatSlider(min=0.1, max=0.4, step=0.01, value=0.2)
ipywidgets.link((sred, "value"), (nv.volumes[1], "cal_min"))
sgreen = ipywidgets.FloatSlider(min=0.1, max=0.4, step=0.01, value=0.2)
ipywidgets.link((sgreen, "value"), (nv.volumes[2], "cal_min"))
ipywidgets.HBox([sred, sgreen])

[manzt]

[kolibril13]

works on my side as well, great work!