refactor: split the transports into the modules GLOSSARY.md names

Code moves unchanged; only files and names change.

- entryPoints/WebUiRoutes.cpp: registerWebUiRoutes(), the port 80 routes
  and the UI's files, with the helpers only they use.
- entryPoints/ApiRoutes.cpp: registerApiRoutes(), the port 8081 routes.
- entryPoints/Web.cpp keeps the servers' lifecycle, auth and the handlers
  both route sets call; entryPoints/WebRoutes.h is what the three share.
- entryPoints/MQTT.* -> MqttConnection.*, class MQTTClass -> MqttConnection.
- outputs/SomfyMqtt.cpp -> outputs/MqttPublisher.cpp.
- outputs/Sockets.* -> outputs/SocketEmitter.*.

The subscribe and unsubscribe lists (the latter repeated
groups/+/direction/set) become MqttCommands' MQTT_COMMAND_TOPICS, and a
native test checks the parser takes every topic in it. GLOSSARY.md gains
MqttConnection and Change fan-out.

328 native tests. Flash: esp32devdbg +3,112 bytes (the routes are a second
ArduinoJson file), esp32dev -2,336 bytes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ESPNetwork.cpp

@@ -14,17 +14,17 @@ static inline void safe_wdt_reset() {
 #include "ConfigSettings.h"
 #include "ESPNetwork.h"
 #include "entryPoints/Web.h"
-#include "outputs/Sockets.h"
+#include "outputs/SocketEmitter.h"
 #include "Utils.h"
 #include "SSDP.h"
-#include "entryPoints/MQTT.h"
+#include "MqttConnection.h"
 
 static const char *TAG = "Network";
 
 extern ConfigSettings settings;
 extern Web webServer;
 extern SocketEmitter sockEmit;
-extern MQTTClass mqtt;
+extern MqttConnection mqtt;
 extern rebootDelay_t rebootDelay;
 extern ESPNetwork net;
 extern SomfyShadeController somfy;