fix: fixing file_repository for new dyn layout, updating readme, deleting unused From for PrimaryKeyType

rear/src/admin/domain.rs

@@ -326,16 +326,6 @@ pub mod repository {
         }
     }
 
-    impl From<String> for Box<dyn PrimaryKeyType> {
-        fn from(s: String) -> Box<dyn PrimaryKeyType> {
-            if let Ok(i) = s.parse::<i64>() {
-                Box::new(i)
-            } else {
-                Box::new(s)
-            }
-        }
-    }
-
     #[async_trait]
     pub trait AdminRepository: Send + Sync {
         type Key: PrimaryKeyType;