N°8641 - Dashboard editor front-end first commit for Form SDK integration.

* No dashlet edition
* Dashboard are not persisted
* Unable to load a dashboard from an endpoint (refresh)
* Grid library need proper npm integration

node_modules/gridstack/dist/angular/lib/gridstack.module.d.ts

@@ -0,0 +1,31 @@
+import * as i0 from "@angular/core";
+import * as i1 from "./gridstack-item.component";
+import * as i2 from "./gridstack.component";
+/**
+ * @deprecated Use GridstackComponent and GridstackItemComponent as standalone components instead.
+ *
+ * This NgModule is provided for backward compatibility but is no longer the recommended approach.
+ * Import components directly in your standalone components or use the new Angular module structure.
+ *
+ * @example
+ * ```typescript
+ * // Preferred approach - standalone components
+ * @Component({
+ *   selector: 'my-app',
+ *   imports: [GridstackComponent, GridstackItemComponent],
+ *   template: '<gridstack></gridstack>'
+ * })
+ * export class AppComponent {}
+ *
+ * // Legacy approach (deprecated)
+ * @NgModule({
+ *   imports: [GridstackModule]
+ * })
+ * export class AppModule {}
+ * ```
+ */
+export declare class GridstackModule {
+    static ɵfac: i0.ɵɵFactoryDeclaration<GridstackModule, never>;
+    static ɵmod: i0.ɵɵNgModuleDeclaration<GridstackModule, never, [typeof i1.GridstackItemComponent, typeof i2.GridstackComponent], [typeof i1.GridstackItemComponent, typeof i2.GridstackComponent]>;
+    static ɵinj: i0.ɵɵInjectorDeclaration<GridstackModule>;
+}