Make Arch Addon
Simple add-on which allow to align existing vertices to arc/circle segment with center point in cursor position.
You can adjust arc radius or axis to align depending to your current 3d cursor position.
Very handy for keeping your additional vertices aligned when you're modelling rims with mirror and array modifiers.
Tested on Blender v 4.0 and 4.1. (probably should work since 3.0).