Some work on interfaces

I'm not happy. It kinda sucks right now. I hope I can fix it~~~~~

But for now I must move to my laptop

atproto/src/lib.rs

@@ -4,14 +4,24 @@ use core::str::FromStr;
 pub use atrium_api::types::{
   Collection,
   string::{
+    AtIdentifier as Authority,
+    Cid,
+    Datetime,
+    Did,
     Nsid,
     RecordKey,
-    AtIdentifier as Authority,
+    Tid,
+    Handle,
   }
 };
 
 pub mod lexicons;
 
+pub struct StrongRef<T> {
+  pub content: T,
+  pub cid: Cid,
+}
+
 pub struct Uri {
   whole: String,
   // These fields could be useful in the future,