Add a one hit perm (instant dig)

Currently, in semi-creative, there is the ability to one hit to mine, chop, and destroy (called instant dig in the official perms write up) and this is great. However, this perm comes with godmode so the only way to enjoy the benefits of instant-dig is to accept the loss of PvE. I would love to be able to instant dig and yet still be vulnerable to animal attacks at the same time so... faster gathering, but I'm still in survival mode. It would also be nice if this were not hooked to GM1 so that I can use instant dig without seeing a creative menu.