cannot configure keyboard with a rotary encoder and ENCODER_MAP_ENABLE = no

[yoichi]

If we use remap with a keyboard with a rotary encoder and a firmware built with ENCODER_MAP_ENABLE = no,
https://remap-keys.app/configure will not go beyond "Opening keyboard".

For comparison, looking at the behavior of https://usevia.app, it seems that only the rotary encoder customization is treated as an error.

Error message on clicking the rotary encoder button on browser:

I think remap-keys.app can handle error when the qmk firmware doesn't handle id_dynamic_keymap_get_encoder.

https://github.com/qmk/qmk_firmware/blob/65aef7be95025a8a26fa8fe0c4af3ce0d36f47f4/quantum/via.c#L440

I found this problem with cocot46plus and its default firmware (aki27kbd/cocot46plus#5)