Move enterprise mode related customizations to new file (#463)

* Move enterprise mode related customizations to new file

* Fix cargo clippy error

* Add is_enterpris_rp_id API to avoid cloning

* Only expose enterprise_rp_id_list API in std

src/ctap/data_formats.rs

@@ -1052,7 +1052,7 @@ impl From<SetMinPinLengthParams> for cbor::Value {
 }
 
 /// The level of enterprise attestation allowed in MakeCredential.
-#[derive(Debug, PartialEq)]
+#[derive(Clone, Copy, Debug, PartialEq)]
 pub enum EnterpriseAttestationMode {
     /// Enterprise attestation is restricted to a list of RP IDs. Add your
     /// enterprises domain, e.g. "example.com", to the list below.