feature: dump and load data

lua/django/mappings.lua

@@ -9,6 +9,20 @@ local mappings = {
       end,
       desc = "create app",
     },
+    ["<leader>jd"] = {
+      function()
+        django.dump_data()
+      end,
+      desc = "dump data",
+    },
+    ["<leader>jo"] = {
+      function()
+        django.load_data()
+      end,
+      desc = "load data",
+    },
+
+
     ["<leader>jp"] = {
       function()
         django.create_package()