preset for leisure=sauna

[abdeldjalil09]

https://wiki.openstreetmap.org/wiki/Tag:leisure%3Dsauna

[bhousel]

This is a great beginner task 👍 Someone just needs to

• create a new file data/presets/presets/leisure/sauna.json with the stuff below
• then npm run build

{
    "fields": [
        "name",
        "operator",
        "address",
        "opening_hours",
        "access_simple",
        "fee"
    ],
    "geometry": [
        "point",
        "area"
    ],
    "tags": {
        "leisure": "sauna"
    },
    "name": "Sauna"
}