Refactor GatewayModbus and GatewayNetwork components

- Updated GatewayModbusConfig to allow uart_port and pin values to be -1, indicating an unconfigured state.
- Enhanced GatewayNetworkService to support an additional setup AP button with configurable GPIO and active low settings.
- Refactored boot button configuration logic to reduce redundancy and improve clarity.
- Introduced a new method for handling GPIO input configuration.
- Improved boot button task loop to handle both boot and setup AP buttons more effectively.
- Added programming mode functionality to EtsDeviceRuntime, allowing toggling and querying of the programming state.
- Implemented memory checks to avoid unnecessary reads in EtsDeviceRuntime.
- Enhanced security storage to derive factory FDSK from the device's serial number and store it in NVS.
- Updated factory FDSK loading logic to ensure proper key generation and storage.

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

components/openknx_idf/include/openknx_idf/ets_device_runtime.h

@@ -29,11 +29,15 @@ class EtsDeviceRuntime {
   uint16_t individualAddress() const;
   uint16_t tunnelClientAddress() const;
   bool configured() const;
+  bool programmingMode() const;
+  void setProgrammingMode(bool enabled);
+  void toggleProgrammingMode();
   EtsMemorySnapshot snapshot() const;
 
   void setFunctionPropertyHandlers(FunctionPropertyHandler command_handler,
                                    FunctionPropertyHandler state_handler);
   void setGroupWriteHandler(GroupWriteHandler handler);
+  void setNetworkInterface(esp_netif_t* netif);
 
   bool handleTunnelFrame(const uint8_t* data, size_t len, CemiFrameSender sender);
   bool handleBusFrame(const uint8_t* data, size_t len);