Add support for Add activity - forward verbatim

src/apub.rs

@@ -33,6 +33,7 @@ pub struct PublicKey {
 #[derive(Clone, Debug, Eq, Ord, PartialEq, PartialOrd, serde::Deserialize, serde::Serialize)]
 #[serde(rename_all = "PascalCase")]
 pub enum ValidTypes {
+    Add,
     Accept,
     Announce,
     Create,

src/routes/inbox.rs

@@ -71,7 +71,9 @@ pub(crate) async fn route(
             handle_announce(&state, &jobs, input, actor).await?
         }
         ValidTypes::Follow => handle_follow(&config, &jobs, input, actor).await?,
-        ValidTypes::Delete | ValidTypes::Update => handle_forward(&jobs, input, actor).await?,
+        ValidTypes::Add | ValidTypes::Delete | ValidTypes::Update => {
+            handle_forward(&jobs, input, actor).await?
+        }
         ValidTypes::Undo => handle_undo(&config, &jobs, input, actor, is_connected).await?,
     };