Add favorite model

Author: condef5

api/db/schema.rb

@@ -69,6 +69,15 @@
     t.index ["user_id"], name: "index_favorites_on_user_id"
   end
 
+  create_table "favorites", force: :cascade do |t|
+    t.bigint "club_id"
+    t.bigint "user_id"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["club_id"], name: "index_favorites_on_club_id"
+    t.index ["user_id"], name: "index_favorites_on_user_id"
+  end
+
   create_table "sport_fields", force: :cascade do |t|
     t.string "name"
     t.string "description"