pbptricks – do stuff with pbp (proboards plugin) file

things that plugin editor can't do but pbptricks can:

• save and open plugin as json
• make not editable plugin editable
• add image with any format (including not image formats) like svg

help command output:

usage: python3 pbptricks.py [FILE]
do stuff with pbp (proboards plugin) file

commands:
help, ?  print this help
exit, q  exit
o        open file
ro       reopen current file
c        current file info
sp       save pbp
sj       save json
s        save to current file
+e       make plugin editable
-e       make plugin not editable
aif      add image from file
ail      add image from link (url)

if input starts with `"` it's python3 string literal (`"\x2Be"` is same as `+e`)

pbptricks name insired by winetricks