feat: add UserContextMenuInteraction and MessageContextMenuInteraction (#7003)

Co-authored-by: Rodry <38259440+ImRodry@users.noreply.github.com>
Co-authored-by: Suneet Tipirneni <77477100+suneettipirneni@users.noreply.github.com>
Co-authored-by: Vlad Frangu <kingdgrizzle@gmail.com>
Co-authored-by: GrapeColor <grapecolor@users.noreply.github.com>

src/structures/MessageContextMenuInteraction.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const ContextMenuInteraction = require('./ContextMenuInteraction');
+
+/**
+ * Represents a message context menu interaction.
+ * @extends {ContextMenuInteraction}
+ */
+class MessageContextMenuInteraction extends ContextMenuInteraction {
+  /**
+   * The message this interaction was sent from
+   * @type {Message|APIMessage}
+   * @readonly
+   */
+  get targetMessage() {
+    return this.options.getMessage('message');
+  }
+}
+
+module.exports = MessageContextMenuInteraction;