Adds the inverse of "Defang IP Addresses": restores defanged IPv4 and
IPv6 addresses (e.g. 192[.]168[.]1[.]1 -> 192.168.1.1, 2001[:]db8[:][:]1
-> 2001:db8::1). Mirrors the pattern of the existing "Fang URL" op,
with independent toggles for restoring [.] and [:].
The "Defang IP Addresses" operation already exists; this fills the
missing inverse so defanged IPs in IOC lists, threat reports, etc.
can be round-tripped through CyberChef.
