Treat nums as first-class citizens

Cargo.toml

@@ -1,6 +1,6 @@
 [workspace]
 resolver = "2"
-members = ["borsh_utils", "client", "protocol", "testutil", "wallet", "ptr", "sip7"]
+members = ["borsh_utils", "client", "protocol", "testutil", "wallet", "nums", "sip7"]
 
 [workspace.dependencies]
 anyhow = "1.0"

SUBSPACES.md

@@ -86,7 +86,7 @@ You can create an on-chain identifier that only the controller of the script pub
 $ space-cli createptr 5120d3c3196cb3ed7fa79c882ed62f8e5942e546130d5ae5983da67dbb6c9bdd2e79
 ```
 
-This command creates a UTXO with the same script pubkey and "mints" a space pointer (sptr) derived from it:
+This command creates a UTXO with the same script pubkey and "mints" a num id derived from it:
 
 ```
 sptr13thcluavwywaktvv466wr6hykf7x5avg49hgdh7w8hh8chsqvwcskmtxpd

client/Cargo.toml

@@ -17,7 +17,7 @@ path = "src/lib.rs"
 [dependencies]
 spaces_wallet = { path = "../wallet" }
 spaces_protocol = { path = "../protocol", features = ["std"] }
-spaces_ptr = { path = "../ptr", features = ["std"] }
+spaces_nums= { path = "../nums", features = ["std"] }
 sip7 = { path = "../sip7", features = ["serde"] }
 spacedb = { workspace = true }
 borsh_utils = { path = "../borsh_utils" }