Add Favorite GET, and POST endpoints

src/database/schema.rs

@@ -1,3 +1,11 @@
+table! {
+    favorites (id) {
+        id -> Integer,
+        userid -> Integer,
+        path -> Text,
+    }
+}
+
 table! {
     users (id) {
         id -> Integer,
@@ -5,3 +13,5 @@ table! {
         password -> Text,
     }
 }
+
+allow_tables_to_appear_in_same_query!(favorites, users,);