Masked email: Fastmail's Masked Email API, MaskedEmail/get and /set (ME-1, ME-7a, ME-16)

Advertised as https://www.fastmail.com/dev/maskedemail in the session and on
every account that may hold masks. Masks created through it start pending
unless the create sets a state; pending can't be set again once left; state
and the other mutable fields map onto the same records the x: API uses.

crates/jmap-proto/src/response/mod.rs

@@ -98,6 +98,7 @@ pub enum GetResponseMethod {
     ParticipantIdentity(GetResponse<ParticipantIdentity>),
     ShareNotification(GetResponse<ShareNotification>),
     Registry(GetResponse<Registry>),
+    MaskedEmail(GetResponse<crate::object::fastmail_masked_email::FastmailMaskedEmail>),
 }
 
 #[derive(Debug, serde::Serialize)]
@@ -119,6 +120,7 @@ pub enum SetResponseMethod {
     CalendarEventNotification(Box<SetResponse<CalendarEventNotification>>),
     ParticipantIdentity(Box<SetResponse<ParticipantIdentity>>),
     Registry(Box<SetResponse<Registry>>),
+    MaskedEmail(Box<SetResponse<crate::object::fastmail_masked_email::FastmailMaskedEmail>>),
 }
 
 #[derive(Debug, serde::Serialize)]
@@ -265,6 +267,19 @@ impl<'x> From<GetResponse<Sieve>> for ResponseMethod<'x> {
     }
 }
 
+// inbuxa: Fastmail's MaskedEmail
+impl<'x> From<GetResponse<crate::object::fastmail_masked_email::FastmailMaskedEmail>> for ResponseMethod<'x> {
+    fn from(value: GetResponse<crate::object::fastmail_masked_email::FastmailMaskedEmail>) -> Self {
+        ResponseMethod::Get(GetResponseMethod::MaskedEmail(value))
+    }
+}
+
+impl<'x> From<SetResponse<crate::object::fastmail_masked_email::FastmailMaskedEmail>> for ResponseMethod<'x> {
+    fn from(value: SetResponse<crate::object::fastmail_masked_email::FastmailMaskedEmail>) -> Self {
+        ResponseMethod::Set(SetResponseMethod::MaskedEmail(Box::new(value)))
+    }
+}
+
 impl<'x> From<GetResponse<VacationResponse>> for ResponseMethod<'x> {
     fn from(value: GetResponse<VacationResponse>) -> Self {
         ResponseMethod::Get(GetResponseMethod::VacationResponse(value))