Phase 0: scaffold e_iwd Enlightenment module

Meson build, module entry points, and stub layout for the iwd backend
(D-Bus client, gadget, popup, config, UI widgets). Bodies are TODOs;
this compiles against EFL/E headers but performs no D-Bus work yet.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/e_mod_main.c

@@ -0,0 +1,56 @@
+#include "e_mod_main.h"
+#include "iwd/iwd_manager.h"
+#include "e_mod_gadget.h"
+#include "e_mod_config.h"
+
+E_Iwd_Module *e_iwd = NULL;
+
+EAPI E_Module_Api e_modapi = { E_MODULE_API_VERSION, "iwd" };
+
+EAPI void *
+e_modapi_init(E_Module *m)
+{
+   e_iwd = E_NEW(E_Iwd_Module, 1);
+   e_iwd->module = m;
+
+   if (!eldbus_init())
+     {
+        E_FREE(e_iwd);
+        return NULL;
+     }
+
+   e_iwd->conn = eldbus_connection_get(ELDBUS_CONNECTION_TYPE_SYSTEM);
+   if (!e_iwd->conn)
+     {
+        eldbus_shutdown();
+        E_FREE(e_iwd);
+        return NULL;
+     }
+
+   e_iwd_config_load();
+   e_iwd->manager = iwd_manager_new(e_iwd->conn);
+   e_iwd_gadget_init();
+
+   return m;
+}
+
+EAPI int
+e_modapi_shutdown(E_Module *m EINA_UNUSED)
+{
+   if (!e_iwd) return 1;
+
+   e_iwd_gadget_shutdown();
+   if (e_iwd->manager) iwd_manager_free(e_iwd->manager);
+   e_iwd_config_save();
+   if (e_iwd->conn) eldbus_connection_unref(e_iwd->conn);
+   eldbus_shutdown();
+   E_FREE(e_iwd);
+   return 1;
+}
+
+EAPI int
+e_modapi_save(E_Module *m EINA_UNUSED)
+{
+   e_iwd_config_save();
+   return 1;
+}