Add tooltip for PMTiles

[giswqs]

This PR adds the tooltip option for PMTiles. Fix #571

Adapted from jtmiclat/folium-pmtiles#13. Credits to jtmiclat.

import leafmap 

style = {
    "version": 8,
    "sources": {
        "example_source": {
            "type": "vector",
            "url": "pmtiles://" + url,
            "attribution": 'PMTiles',
        }
    },
    "layers": [
        {
            "id": "buildings",
            "source": "example_source",
            "source-layer": "landuse",
            "type": "fill",
            "paint": {"fill-color": "steelblue"},
        },
        {
            "id": "roads",
            "source": "example_source",
            "source-layer": "roads",
            "type": "line",
            "paint": {"line-color": "black"},
        },
    ],
}

leafmap.view_pmtiles(
    url, 
    name='PMTiles', 
    style=style, 
    zoom_to_layer=True, 
    tooltip=True, 
    map_args={'height': 600}
)

@jinha This might be of interest to you.

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