Convert backend/web from submodule to regular directory

backend/web/src/routes/(authenticated)/settings/agents/+page.svelte

@@ -0,0 +1 @@
+<div>Modèles</div>

backend/web/src/routes/(authenticated)/settings/agents/+page.ts

@@ -0,0 +1,7 @@
+export function load() {
+  return {
+    title: 'Paramétrage : Agents',
+    back: "/settings",
+    theme: "settings"
+  };
+}