If you have a pin with a label containing the letters "GND" in it and it
is not connected to a net with a label also containing "GND" AND there
is another pin on your symbol that _is_ connected to a net containing
"GND", then there is a likelihood that you have accidentally mixed up
your connections to the GND pin
If global or local labels are floating -> error
If global or local labels are only connected to one pin -> warning
Rather than forcing two different errors depending on whether the label
is local or global
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
Power symbols are implicit labels in KiCad, so we should check for their
caps difference against other power symbols as well as against other
labels
Fixes https://gitlab.com/kicad/code/kicad/-/issues/16897
Also fixes some bugs in storing exclusions in
symbol fields and children.
Also fixes some bugs in checking for resolved text
variables in symbol children.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/18279
