Fill Cargo.toml, README.md, LICENSE

rust/ic_principal/Cargo.toml

@@ -1,7 +1,15 @@
 [package]
 name = "ic_principal"
 version = "0.1.0"
+authors = ["DFINITY Stiftung <[email protected]>"]
 edition = "2021"
+documentation = "https://docs.rs/ic_principal"
+repository="https://github.com/dfinity/candid"
+license = "Apache-2.0"
+readme = "README.md"
+categories = ["data-structures", "no-std"]
+keywords = ["internet-computer", "types", "dfinity"]
+include = ["src", "Cargo.toml", "LICENSE", "README.md"]
 
 [dependencies]
 crc32fast = "1.3.0"
@@ -11,7 +19,6 @@ sha2 = "0.10.1"
 thiserror = "1.0.30"
 
 [dev-dependencies]
-serde = { version = "1.0.133", features = ["derive"] }
 serde_cbor = "0.11.2"
 serde_json = "1.0.74"
 serde_test = "1.0.137"

rust/ic_principal/LICENSE

@@ -0,0 +1 @@
+../../LICENSE

rust/ic_principal/README.md

@@ -0,0 +1,5 @@
+# Internet Computer Principal
+
+`Principal` is the data structure for generic identifiers on the Internet Computer.
+
+Check the [ID encoding specification](https://internetcomputer.org/docs/current/references/id-encoding-spec) for more information.