pycctx needs to distinguish between p2pk and p2pkh while signing

[Alrighttt]

As of right now, it seems the pycctx app is assuming all normal(non-CC) inputs are p2pkh. It's possible I am overlooking something here, so if this is not the case, please let me know. It would be preferable if pycctx could automatically detect whether it is p2pk or p2pkh.