Move SuperDuper mode to Karabiner-elements

[narze]

Closes #60, and maybe #40 & #59 as well

This PR adds json configuration for Karabiner-elements which enable (S)uper(D)uper mode without utilizing Hammerspoon.

The json data is a bit verbose since it was generated from Goku

The original code:

...
        {:des "S+D -> (S)uper(D)uper Mode" :rules [[{:sim [:s :d]
                                     :simo {:interrupt true
                                            :dorder :insensitive
                                            :uorder :insensitive
                                            :afterup [{:set ["superduper-mode" 0]}]}} [{:set ["superduper-mode" 1]}]]]}
        {:des "(S)uper(D)uper + H -> Left" :rules [:superduper-mode [:##h :left_arrow]]}
        {:des "(S)uper(D)uper + J -> Down" :rules [:superduper-mode [:##j :down_arrow]]}
        {:des "(S)uper(D)uper + K -> Up" :rules [:superduper-mode [:##k :up_arrow]]}
        {:des "(S)uper(D)uper + L -> Right" :rules [:superduper-mode [:##l :right_arrow]]}
        {:des "(S)uper(D)uper + A -> Option" :rules [:superduper-mode [:##a :left_option]]}
        {:des "(S)uper(D)uper + F -> Command" :rules [:superduper-mode [:##f :right_command]]}
        {:des "(S)uper(D)uper + Space -> Shift" :rules [:superduper-mode [:##spacebar :right_shift]]}
        {:des "(S)uper(D)uper + U -> First Tab" :rules [:superduper-mode [:##u :!C1]]}
        {:des "(S)uper(D)uper + I -> Prev Tab" :rules [:superduper-mode [:##i :!CSopen_bracket]]}
        {:des "(S)uper(D)uper + O -> Next Tab" :rules [:superduper-mode [:##o :!CSclose_bracket]]}
        {:des "(S)uper(D)uper + P -> Last Tab" :rules [:superduper-mode [:##p :!C9]]}
...

Pros of using this mode on KE:

• Key binding will be near-hardware level, or it will be on physical S+D keys no matter what keyboard layout you use (I'm using Colemak.) It also applies to h,k,k,l keys as well.
• Simultaneous threshold value can be set within KE
• Much faster than Hammerspoon. I've been using it by myself for more than a year without issues in this mode.

Cons:

• You cannot see "(S)uper(D)uper Mode" while pressing S+D anymore.

[jasonrudolph]

Thanks for this pull request, @narze! It may be a while before I can give this a proper review, but I look forward to trying it out. 🙇

[jasonrudolph]

Thanks for this contribution, @narze! ⚡