[Map] Enhance ux_map(), allow to create a Map directly in Twig!

[Kocal]

Q	A
Bug fix?	no
New feature?	yes
Issues	Fix #...
License	MIT

A lighter alternative to #2117.

Note that this PR is not 100% complete, it's a POC, it's missing some runtime-checks and options to build a map.

With the following code:

{{ ux_map(
    center=[51.5074, 0.1278],
    fit_bounds_to_markers=true,
    zoom=10,
    markers= [
        { position: [51.5074, 0.1278], title: 'London' },
        { position: [48.8566, 2.3522], title: 'Paris' },
        {
            position: [40.7128, -74.0060], 
            title: 'New York',
            infoWindow: { content: 'Welcom to <b>New York</b>', opened: true }
        },
    ],
    attributes={
        class: 'foo',
        style: 'height: 400px; width: 100%;',
    }
) }}

I'm able to render this map:

WDYT @smnandre?