Pin location

[teamcons]

Problem

i forgot... where are our friends again?

Proposal

It would be nice to pin and label specific places, like a pin on a globe, from a right click
each pin having a colour, and a label
eventually a popover could list all pins and one could quickly navigate clicking on labels

in a far and distant future it could be connected with contacts, so i have both the addresse in the contacts app, and it shows up on the map

Prior Art (Optional)

No response

[teamcons]

Expansion on the idea:

click on the map shows a Gtk.Popover, with "Save pin", two fields: "location name", "more infos", and accent color (and i guess a delete button, but leaving the two fields empty would delete/not register anything)
A button, with popover, on the top, allows to quicky jump the view between pins

Pins are objects, with longitude, latitude, color, name, info, with to_json() and from_json(Json.Node) methods
Pins are saved in a Json.Array, and saved on-disk - allowing easy retrieval or deletion by the user should the need arise (personal data after all)

tbh i like the idea so if people are onboard maybe i can try that out