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/dd-base-impl.js

@@ -0,0 +1,70 @@
+/**
+ * dd-base-impl.ts 12.3.2
+ * Copyright (c) 2021-2025  Alain Dumesny - see GridStack root license
+ */
+/**
+ * Abstract base class for all drag & drop implementations.
+ * Provides common functionality for event handling, enable/disable state,
+ * and lifecycle management used by draggable, droppable, and resizable implementations.
+ */
+export class DDBaseImplement {
+    constructor() {
+        /** @internal */
+        this._eventRegister = {};
+    }
+    /**
+     * Returns the current disabled state.
+     * Note: Use enable()/disable() methods to change state as other operations need to happen.
+     */
+    get disabled() { return this._disabled; }
+    /**
+     * Register an event callback for the specified event.
+     *
+     * @param event - Event name to listen for
+     * @param callback - Function to call when event occurs
+     */
+    on(event, callback) {
+        this._eventRegister[event] = callback;
+    }
+    /**
+     * Unregister an event callback for the specified event.
+     *
+     * @param event - Event name to stop listening for
+     */
+    off(event) {
+        delete this._eventRegister[event];
+    }
+    /**
+     * Enable this drag & drop implementation.
+     * Subclasses should override to perform additional setup.
+     */
+    enable() {
+        this._disabled = false;
+    }
+    /**
+     * Disable this drag & drop implementation.
+     * Subclasses should override to perform additional cleanup.
+     */
+    disable() {
+        this._disabled = true;
+    }
+    /**
+     * Destroy this drag & drop implementation and clean up resources.
+     * Removes all event handlers and clears internal state.
+     */
+    destroy() {
+        delete this._eventRegister;
+    }
+    /**
+     * Trigger a registered event callback if one exists and the implementation is enabled.
+     *
+     * @param eventName - Name of the event to trigger
+     * @param event - DOM event object to pass to the callback
+     * @returns Result from the callback function, if any
+     */
+    triggerEvent(eventName, event) {
+        if (!this.disabled && this._eventRegister && this._eventRegister[eventName])
+            return this._eventRegister[eventName](event);
+    }
+}
+//# sourceMappingURL=dd-base-impl.js.map