keystore: revamp (#1142)

* keystore: revamp

* fix: KeyStore.Close dependencies

* keystore: implement KeyStore4

Author: guillaumemichel

go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/ipfs/go-datastore v0.8.2
 	github.com/ipfs/go-detect-race v0.0.1
 	github.com/ipfs/go-log/v2 v2.8.0
-	github.com/ipfs/go-test v0.2.2
+	github.com/ipfs/go-test v0.2.3
 	github.com/libp2p/go-libp2p v0.43.0
 	github.com/libp2p/go-libp2p-kbucket v0.7.1-0.20250718125122-f77e735b68e8
 	github.com/libp2p/go-libp2p-record v0.3.1

go.sum

@@ -142,8 +142,8 @@ github.com/ipfs/go-ipfs-util v0.0.1/go.mod h1:spsl5z8KUnrve+73pOhSVZND1SIxPW5RyB
 github.com/ipfs/go-log v0.0.1/go.mod h1:kL1d2/hzSpI0thNYjiKfjanbVNU+IIGA/WnNESY9leM=
 github.com/ipfs/go-log/v2 v2.8.0 h1:SptNTPJQV3s5EF4FdrTu/yVdOKfGbDgn1EBZx4til2o=
 github.com/ipfs/go-log/v2 v2.8.0/go.mod h1:2LEEhdv8BGubPeSFTyzbqhCqrwqxCbuTNTLWqgNAipo=
-github.com/ipfs/go-test v0.2.2 h1:1yjYyfbdt1w93lVzde6JZ2einh3DIV40at4rVoyEcE8=
-github.com/ipfs/go-test v0.2.2/go.mod h1:cmLisgVwkdRCnKu/CFZOk2DdhOcwghr5GsHeqwexoRA=
+github.com/ipfs/go-test v0.2.3 h1:Z/jXNAReQFtCYyn7bsv/ZqUwS6E7iIcSpJ2CuzCvnrc=
+github.com/ipfs/go-test v0.2.3/go.mod h1:QW8vSKkwYvWFwIZQLGQXdkt9Ud76eQXRQ9Ao2H+cA1o=
 github.com/ipld/go-ipld-prime v0.21.0 h1:n4JmcpOlPDIxBcY037SVfpd1G+Sj1nKZah0m6QH9C2E=
 github.com/ipld/go-ipld-prime v0.21.0/go.mod h1:3RLqy//ERg/y5oShXXdx5YIp50cFGOanyMctpPjsvxQ=
 github.com/jackpal/go-nat-pmp v1.0.2 h1:KzKSgb7qkJvOUTqYl9/Hg/me3pWgBmERKrTGD7BdWus=