Add license to crates (#7578)

* Add license to crates

This is required to publish to crates.io

* Add more licenses

polkadot/node/network/protocol/Cargo.toml

@@ -3,6 +3,7 @@ name = "polkadot-node-network-protocol"
 version.workspace = true
 authors.workspace = true
 edition.workspace = true
+license.workspace = true
 description = "Primitives types for the Node-side"
 
 [dependencies]