Convert backend/web from submodule to regular directory

backend/web/.vscode/settings.json

@@ -0,0 +1,14 @@
+{
+	"files.associations": {
+		"*.css": "tailwindcss"
+	},
+	"svelte/no-navigation-without-resolve": [
+    "error",
+    {
+      "ignoreGoto": false,
+      "ignoreLinks": false,
+      "ignorePushState": false,
+      "ignoreReplaceState": false
+    }
+  ]
+}