feat: set methods for MessageActionRow and MessageSelectMenu (#6490)

src/structures/MessageActionRow.js

@@ -59,6 +59,16 @@ class MessageActionRow extends BaseMessageComponent {
     return this;
   }
 
+  /**
+   * Sets the components of the action row.
+   * @param {...MessageActionRowComponentResolvable[]} components The components to set
+   * @returns {MessageActionRow}
+   */
+  setComponents(...components) {
+    this.spliceComponents(0, this.components.length, components);
+    return this;
+  }
+
   /**
    * Removes, replaces, and inserts components in the action row.
    * @param {number} index The index to start at