For now, the new <pdb.h> file only has a function to start the library,
based on the old start_pd function from main.c. It'll eventually be all
a user needs to include, but there's a lot more refactoring to do.
/!\ BROKEN BUILD /!\
This commit moves the library code to the library directory. This
causes the firmware to not compile. A few changes were made to reduce
the nubmer of errors, but some errors just aren't going to go away until
I go ahead with the planned changes.
There are still a few things that the standard says we Shall do and we
don't, but it Works For Me™. I haven't implemented anything with
regards to GiveBack support, but that doesn't matter just yet. Our
handling of VDMs isn't quite right either. Anyway, it successfully
negotiates with so-called Split PDO power supplies, which is more than I
can say about some commercial products.