Pin location

### 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_