ctap2-proto: Add authenticator::client_pin::raw::RawSubcommand

This type is used for serialization and deserialization of subcommands
as raw u8s.

crates/ctap2-proto/src/authenticator/client_pin/raw/mod.rs

@@ -2,5 +2,25 @@
 //! possible in CBOR format while maintaining ergonomic enum variants for public
 //! API.
 
+use serde::{Deserialize, Serialize};
 mod public_key;
 
+#[derive(Clone, Serialize, Deserialize)]
+#[serde(into = "u8")]
+pub(crate) enum RawSubcommand {
+    GetPinRetries = 0x01,
+    GetKeyAgreement = 0x02,
+    SetPin = 0x03,
+    ChangePin = 0x04,
+    GetPinToken = 0x05,
+    GetPinUvAuthTokenUsingUvWithPermissions = 0x06,
+    GetUvRetries = 0x07,
+    GetPinUvAuthTokenUsingPinWithPermissions = 0x09,
+}
+
+impl From<RawSubcommand> for u8 {
+    fn from(value: RawSubcommand) -> Self {
+        value as u8
+    }
+}
+