[BUG]: geo projections lose their D3 default rotation

Description

Geo.updateProjection calls projection.rotate([-rotation.lon, -rotation.lat, rotation.roll]) unconditionally. For a world-scope map projection.rotation defaults to [0, 0, 0], so any rotation the D3 projection ships with is discarded.

Six of the projections in plotly.js carry a non-identity default rotation:

For the quincuncials and wiechel that rotation is geometric: it places the sphere in the polar aspect and tilts the square 45°, and is applied inside the projection's own constructor:

// d3-geo-projection/src/quincuncial/index.js
return projection(projectQuincuncial)
    .rotate([-90, -90, 45])
    .clipAngle(180 - 1e-3);

Replacing it renders a different orientation from the one D3 defines. (For albers, D3's [96, 0, 0] preconfigures it for the USA, so discarding it is probably intended.)

Screenshots/Video

For 'peirce quincuncial':

D3 projection	Plotly projection

Steps to reproduce

• Be on master
• Open Plotly devtools
• Enter the following snippet into the browser console:

Plotly.newPlot(gd, [{
    type: 'choropleth',
    locations: ['GHA', 'ARG', 'AUS', 'CAN'],
    z: [1, 2, 3, 4],
    showscale: false
}], {
    geo: { projection: { type: 'peirce quincuncial' }, fitbounds: false },
    height: 800
});

• Note that
• Expected: the canonical peirce quincuncial orientation.
• Actual: rendered with rotation [0, 0, 0].

Screenshots

Notes

• A fix needs to compose the requested rotation onto each projection's default rather than replace it, since d3.geoProjection.rotate() replaces
• This was discovered in #7948. It's possible that this is intentional for a good reason, but it would be worth looking at changing it regardless.

Commencez par Geo.updateProjection et comparez la gestion de la rotation avec les constructeurs de projections de D3, en particulier les valeurs par défaut de quincuncial et wiechel décrites dans l’issue. Reproduisez l’exemple peirce quincuncial dans le navigateur, puis vérifiez que l’orientation rendue conserve la valeur par défaut canonique de la projection tout en appliquant une rotation demandée.