feat: Enhance EtsDeviceRuntime constructor and multicast handling

- Updated EtsDeviceRuntime constructor to accept an optional tunnel_client_address parameter with a default value of 0.
- Modified EspIdfPlatform::setupMultiCast to use IPPROTO_UDP for socket creation and improved multicast interface selection based on the current IP address.
- Ensured that the multicast interface is set only if a valid local address is available.
- Adjusted the client address assignment in EtsDeviceRuntime to use the provided tunnel_client_address if valid, falling back to the default otherwise.

Signed-off-by: Tony <tonylu@tony-cloud.com>

components/openknx_idf/include/openknx_idf/ets_device_runtime.h

@@ -23,7 +23,9 @@ class EtsDeviceRuntime {
                                                      const uint8_t* data, size_t len,
                                                      std::vector<uint8_t>* response)>;
 
-  EtsDeviceRuntime(std::string nvs_namespace, uint16_t fallback_individual_address);
+  EtsDeviceRuntime(std::string nvs_namespace,
+                   uint16_t fallback_individual_address,
+                   uint16_t tunnel_client_address = 0);
   ~EtsDeviceRuntime();
 
   uint16_t individualAddress() const;