chore: added clib.json

[edd255]

Added a JSON dictionary for the clib package manager to make installing argparse in new projects more convenient.

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[edd255]

/assign @cofyc

[cofyc]

hi @edd255 I didn't use clib package system. Is it widely used?

[edd255]

It's not a must, it's just nice to have. It doesn't seem to be widely used, though.