Add RFC 5155 DNSSEC RR Type Support (NSEC3, NSEC3PARAM)

Add encoding and decoding support for hashed denial-of-existence DNSSEC Resource Record types defined in RFC 5155.

• NSEC3 (TYPE=50): Parse/generate RDATA including Hash Algorithm, Flags, Iterations, Salt, Next Hashed Owner Name, Type Bit Maps.
• NSEC3PARAM (TYPE=51): Parse/generate RDATA including Hash Algorithm, Flags, Iterations, Salt.
• Requires handling specific hashing and base32hex encoding/decoding aspects within the RDATA logic.