This makes the filters similar to output options.
- Adds coherence to error messages.
- Enable aliases (used the ones suggested by @leoheck)
Additionally now the README.md preflights documentation comes directly
from --help-preflights
Now the options are just an attribute of the outputs.
It means we have a set of classes for the options.
All the output content is parsed by the classes, including the Layers.
Now the layers support a simple string (with interesting shortcuts), a list of
strings or the original list of dicts.
After analyzing all the forks I found that at least 6 forks tried to fix the
Inner.X vs InX.Cu difference.
Also one seems to add support for the names used by pcbnew, but breaks
compatibility with old config files.
The --help-outputs and --help are embedded in the README.md
To make it easier to read now options are enclosed in `` and the list of
outputs is sorted.
SET