Fetch and print the MAC address in the app and wifi setup page

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https://github.com/Lixie-Labs/Emotiscope/blob/e2d89be206f791864b73d6a131e7c6747232e510/src/wireless.h#L353

        WiFi.begin(wifi_ssid, wifi_pass);  // Start the WiFi connection with the
                                        // SSID and password parsed in configuration.h
        printf("Started connection attempt to %s...\n", wifi_ssid);

        // Define a variable to hold the MAC address
        uint8_t mac_address[6]; // MAC address is 6 bytes

        // Retrieve the MAC address of the device
        WiFi.macAddress(mac_address);
        //esp_read_mac(mac_address, ESP_MAC_WIFI_STA); // Use ESP_MAC_WIFI_STA for station interface

        // Define a char array to hold the formatted MAC address string
        char mac_str[18]; // MAC address string format "XX:XX:XX:XX:XX:XX" + '\0'

        // Format the MAC address into the char array
        snprintf(mac_str, sizeof(mac_str), "%02X:%02X:%02X:%02X:%02X:%02X",
                mac_address[0], mac_address[1], mac_address[2],
                mac_address[3], mac_address[4], mac_address[5]);

        // Print the MAC address string
        printf("MAC Address: %s\n", mac_str);

        // TODO: Fetch and print the MAC address in the app and wifi setup page
    }

    esp_wifi_set_ps(WIFI_PS_NONE);