Removes some unneeded calculations and threads the remaining.
Threading was previously removed to avoid overhead issues with small
boards. This is no longer needed with the thread pool implementation
Fixes https://gitlab.com/kicad/code/kicad/issues/12131
Removes the TTL triangulator in favor of the delaunator triangulator.
This removes the only AGPL code in the KiCad codebase and therefore
allows the full project to be licensed under the GPLv3.
Instead of iterating over full set, use sweep line algorithm to limit
the number of nodes needed to be searched. This improves the speed of
the dynamic ratsnest.
Seth Hillbrand
Jeff Young
Wayne Stambaugh