Karabiner-Elements complex_modifications rule to map `ctrl+backtick` to `esc`

ctrl-backtick-to-esc.json.erb

{
  "title": "control grave accent (backtick) posts escape",
  "rules": [
    {
      "description": "Post Escape if Left Ctrol + grave_accent_and_tilde (backtick) is pressed.",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "grave_accent_and_tilde",
            "modifiers": {
              "mandatory": [ "left_command" ],
              "optional": [ "caps_lock" ]
            }
          },
          "to": [
            {
              "key_code": "escape"
            }
          ]
        }
      ]
    }
  ]
}