Adds QA checks to copper sliver tests. Adds the following checks:
- Dot product between two arms (quickly avoids checks for >90°)
- Checks the sliver is convex (area test)
- Eliminates minor slivers with angles that are approximately 0 and ones
with the opposite side width beneath a configurable level
- Updates Clipper2 to fix a couple of jagged edges on inflate
- Adds simplify during zone fill inflation to limit jaggies
Fixes https://gitlab.com/kicad/code/kicad/issues/14549
(cherry picked from commit f7f52d77e4)
Rebased by Jeff Young <jeff@rokeby.ie> 5 April 2023
(Also includes a bug-fix for highlighting collisions with edge-cut
items.)
(cherry picked from commit bfbda978b8)
Bugs found but not fixed yet:
* Reference and Value are not converted correctly yet
* HOTFIX: test commented out
* GP3906-TLP and UBLOX_ZOE_M8-0-10 are not able to import the description again
* HOTFIX: description removed from gold file