add alternative formats for coordinate search:

[tyrasd]

• zoom/x/y – to copy/paste from an osm.org URL or web map with map-hash param (this also sets map zoom to the respective value)
• x/y – like the above, but does not set zoom level
• x y (or x/y, or x,y) – where x and y are numbers in the user's locale's number format

todo:

• check if this works as intended for more locale number formats (I only tested with English¹ and with , as decimal separator).
• add unit tests
• add to changelog

for reference, this is based on the work in #8769 to support localized number formats.

Footnotes

1. English is actually a little bit odd, as if you feed it a number like 1,23 it will interpret the , as a thousands group separator, resulting in a coordinate of 123 magnitude. One could argue that it does not make much sense to allow thousands separators in a coordinate (as it cannot be larger than 180), but other locales could potentially use groups with only two digits?! ↩