Update whitefox/konstantin keymap (#4363)

Update whitefox/konstantin keymap (#4363)

* Use Magic+Esc for entering bootloader mode

* Expand rules.mk

* Improve FN_RCTL tap dance

* Avoid one-line if statements

* Add PROGMEM to keymaps definition

* td_fn_rctl_* → td_fn_rctrl_*

* Fix FN_RCTL tap dance bug when count is 4, 8, 12 etc.

* Add ACTION_TAP_DANCE_DOUBLE_MODS

* Rearrange/rename keycode defines

* Use RAL_RGU and RCT_RSF in keymaps

* Replace keymap ASCII art with box drawing characters

* Add FN_FNLK and use it

* Set Unicode input mode in eeconfig_init_user instead of matrix_init_user