pcapng enhancements (idb,epb) and some fixes (#4342)

* pcapng enhancements (idb,epb) and some fixes
Based on draft-ietf-opsawg-pcapng-latest, 5 March 2024.
   -map packet.sniffed_on to unique IDB id. When writing, if_name option and linktype is populated based on the first packet seen with a unique sniffed_on string.
   -map packet.direction to EPB flags inbound/outbound direction bits. Remaining flag bits not implemented.
   -simplified RawPcapNgReader._read_options() and moved (code,value) treatment to the caller since codes of same type can have different meaning for different type of blocks.
   -Fix RawPcapNgReader._read_block_shb() and _write_block_shb().

---------

Co-authored-by: Guillaume Valadon <guillaume@valadon.net>

scapy/packet.py

@@ -430,6 +430,8 @@ def copy(self) -> Self:
         clone.payload.add_underlayer(clone)
         clone.time = self.time
         clone.comment = self.comment
+        clone.direction = self.direction
+        clone.sniffed_on = self.sniffed_on
         return clone
 
     def _resolve_alias(self, attr):
@@ -1140,6 +1142,8 @@ def clone_with(self, payload=None, **kargs):
         )
         pkt.wirelen = self.wirelen
         pkt.comment = self.comment
+        pkt.sniffed_on = self.sniffed_on
+        pkt.direction = self.direction
         if payload is not None:
             pkt.add_payload(payload)
         return pkt