Added (excluded) Dropzone Module for more comprehensive module example (#4098)

* DropzoneModule hello world

* Buttoning things up

* Exclude by default

* Upstream refs

* Cleanup

* Add modules folder to path

* Case and path matters

* Exclude from header

* Guard

src/modules/Modules.cpp

@@ -70,6 +70,11 @@
 #include "modules/SerialModule.h"
 #endif
 #endif
+
+#if !MESHTASTIC_EXCLUDE_DROPZONE
+#include "modules/DropzoneModule.h"
+#endif
+
 /**
  * Create module instances here.  If you are adding a new module, you must 'new' it here (or somewhere else)
  */
@@ -100,6 +105,10 @@ void setupModules()
 #if !MESHTASTIC_EXCLUDE_ATAK
         atakPluginModule = new AtakPluginModule();
 #endif
+
+#if !MESHTASTIC_EXCLUDE_DROPZONE
+        dropzoneModule = new DropzoneModule();
+#endif
         // Note: if the rest of meshtastic doesn't need to explicitly use your module, you do not need to assign the instance
         // to a global variable.