CHANGED: PCB file format now supports saving/loading complex padstacks
CHANGED: PTH pads are now rendered per copper layer in the copper color;
the PTH pad color is no longer used.
ADDED: support for importing complex pad stacks from Altium PCBs
Enforce padstack-aware access to pad properties across KiCad
Fixes https://gitlab.com/kicad/code/kicad/-/issues/8182
ADDED: Add support in Pcbnew for exporting ODB++ files under Fabrication
Outputs, base on ODB++Design Format Specification (Release v8.1
Update 3 February 2021).
Note: There is still a lot of work to do if we will make the feature as
complete as the ODB++ spec. However, the current functionality's
completeness is already sufficient to cover general production
scenarios. I have compared the output results with Gerber files by
DFM tool and the accuracy at the graphic level should be able to
cover most usage scenarios. Additionally, I am very grateful to
the great open-source project Horizon EDA for giving me a lot of
inspiration in terms of ideas.
The feature can be enabled by adding "EnableODB=1" to the kicad_advanced
configuration file.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/2019
