Each editor needs the embedded files tab in the
schematic/pcb/symbol/footprint settings. But the footprint may add an
embedded file from the 3d models tab and symbols/footprints may add
embedded files from the grid. This should be immediately visible in the
embedded files tab. Additionally, removing the reference to an embedded
file in the grid or 3d models now removes the embedded file as well.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/18934
We still conflate the fieldID, the position in the
array of fields, and whether or not that means the
field is mandatory. But this attempts to clean up
*some* of that, without introducing too much risk.
Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
This field was redundant (was generally set to the footprint's LIB_ID)
but also buggy (not guaranteed to contain the footprint's LIB_ID)
and confusing (not a way to change the footprint's LIB_ID).
