Add renaming sorts of SoftWare Heritage persistent IDentifiers

See
https://docs.softwareheritage.org/devel/swh-model/persistent-identifiers.html
for the technical details of that spec.

These remaining four sorts of objects coincide with `git-raw`, which is
already in this table. However, adding them here is not redundant,
because the deserialization direction. While a git-raw CID may legally
point to any sort of git object, the relevant SWHIDs specify in the
identifier what sort of git object is expected, and if it points to a
different type of valid git object, deserialization fails. That means
there is no way to losslessly convert a git-coinciding SWHID into a
git-raw CID.

table.csv

@@ -123,6 +123,10 @@ wss,                            multiaddr,      0x01de,         permanent,
 p2p-websocket-star,             multiaddr,      0x01df,         permanent,
 http,                           multiaddr,      0x01e0,         draft,
 swhid-1-snp,                    ipld,           0x01f0,         draft,     SoftWare Heritage persistent IDentifier version 1 snapshot
+swhid-1-rel,                    ipld,           0x01f1,         draft,     SoftWare Heritage persistent IDentifier version 1 release
+swhid-1-rev,                    ipld,           0x01f2,         draft,     SoftWare Heritage persistent IDentifier version 1 revision
+swhid-1-dir,                    ipld,           0x01f3,         draft,     SoftWare Heritage persistent IDentifier version 1 directory
+swhid-1-cnt,                    ipld,           0x01f4,         draft,     SoftWare Heritage persistent IDentifier version 1 content
 json,                           ipld,           0x0200,         permanent, JSON (UTF-8-encoded)
 messagepack,                    serialization,  0x0201,         draft,     MessagePack
 car,                            serialization,  0x0202,         draft,     Content Addressable aRchive (CAR)