Parallel plot: controlling angle and position behavior

Hi plotly team,

When the labelangle is below some threshold, the axis label gets centered automatically (like "choose_from(...)" on the figure below). Instead, we'd like to control this behavior with a parameter, so that long texts can fit the screen nicely, with a low angle and right alignment with the axis. WDYT?

Ideally, something like:

import plotly.graph_objects as go

go.Figure(
    go.Parcoords(
        dimensions=[
            {
                "label": "hello " * 5,
                "values": [1, 2, 4, 5],
            }
        ],
        labelangle=20,
        labelside="top",
        align_center=False, # <-- 
    )
)

See: https://github.com/skrub-data/skrub/issues/1367

Start at the go.Parcoords entry point and inspect how labelangle and labelside are exposed and handled. Determine where the requested align_center behavior belongs, then add coverage showing that a low-angle label can retain the requested alignment without breaking existing defaults.