Make "Snap to common angles" available to "Vertex-tool"

[koenigherford]

Feature description

Improving existing data with "vertex tool" is a common task. It helps to improve data without the need to completely reconstruct the geometries and attributes.
It would be great to have -simmilar to existing "advanced digitizing tool" a option to enable a "snap to common angles-functionality" with "vertex-tool" to get better results of work when modifiing existing data. Many polygons in urban areasfield are having favorite angles (i.e. 0°, 90°,...).
This feature will allow the user to redesign polygon-edges for example on basis of a new aerial photo with more likely angels

Additional context

No response

[uclaros]

This is quite related to #40760
Arbitrary common angles could be tricky, especially when selecting overlapping vertices.
90-180-270 would be super useful indeed!