[SMWS-10] Implement Wi-Fi configuration on ESP32

[marek-lewanczyk]

Description:
Enable the ESP32 to receive and store Wi-Fi credentials provided via the HTML configuration panel.

Tasks:

• Parse Wi-Fi SSID and password from the configuration form.
• Store credentials securely in non-volatile memory.
• Implement logic to connect to the specified Wi-Fi network on startup.
• Provide feedback on connection status.