interception plugin for dual function Esc/Ctrl key at CapsLock

 Using caps2esc with interception-tools offers the optimal keyboard
 experience for vi/Vim/NeoVim aficionados under Wayland/X/Linux console.
 .
  * Dual function Esc/Ctrl key at CapsLock key location
  * CapsLock function key at Esc key location
 .
 This is one of the simplest but hugely useful companion plugin program
 to mangle evdev data with interception-tools. Basically, xmodmap-like
 functionality is realized at the kernel level in this way.