[Keymap] Add narze userspace (#6652)

[Keymap] Add narze userspace (#6652)

* Refactor & reimplement mod tap macros

* Reduce tapping term

* Update readme

* Add narze userspace

* Make use of narze userspace

* Extract Superduper mode

* Refactor Superduper mode

* (Ergodox Infinity) Prevent stuck modifiers

* Update ergodox_infinity/narze likewise

* Add warning for building Infinity with docker

* Fix include eeprom.h in superduper

* Try enabling superduper mode with combo for ergodox infinity

* Apply suggestions on #4546

* Convert to 4 spaces

* Map backlight step key

* Replace PLAY_NOTE_ARRAY

* Fix superduper toggle

* Re enable audio in planck rev4

* Use perform_space_cadet

* Remove superduper mod tap triggers

* Add readme for planck light firmware flashing command

* Remove unused layers

* Remove unused keycodes

* Add backlight toggle

* Remove unused songs & use DEFAULT_LAYER_SONGS

* Update readme

* Move includes to header file