Update filenames from plugins to modules

src/modules/ReplyModule.h

@@ -0,0 +1,22 @@
+#pragma once
+#include "SinglePortPlugin.h"
+
+
+/**
+ * A simple example plugin that just replies with "Message received" to any message it receives.
+ */
+class ReplyPlugin : public SinglePortPlugin
+{
+  public:
+    /** Constructor
+     * name is for debugging output
+     */
+    ReplyPlugin() : SinglePortPlugin("reply", PortNum_REPLY_APP) {}
+
+  protected:
+
+    /** For reply plugin we do all of our processing in the (normally optional)
+     * want_replies handling
+    */
+    virtual MeshPacket *allocReply() override;
+};