[Keymap] Add narze keymap for usb-usb converter (#6881)

* Revert raise/backspace mod tap to just backspace

* Initialize usb_usb/narze

* Modify keys

* Add readme

* Support Right shift to )

* Add Dev layer

* Use Dev layer on holding z key

* Add Dev layer for Ergodox

* Update keyboards/converter/usb_usb/keymaps/narze/README.md

Fix the command & close the code block as suggested

Co-Authored-By: Drashna Jaelre <drashna@live.com>

* Reduce rules

keyboards/converter/usb_usb/keymaps/narze/README.md

@@ -0,0 +1,10 @@
+# narze's layout for usb-usb converter
+
+## Key features
+- Qwerty + [Colemak](https://colemak.com) layouts, and you can type Qwerty on software-level Colemak as well. Very useful for gaming or when your friend wanna type something but don't use Colemak.
+- [(S)uper (D)uper Mode](https://github.com/jasonrudolph/keyboard#super-duper-mode) inspired by [jasonrudolph](https://github.com/jasonrudolph), with [some extensions](https://gist.github.com/narze/861e2167784842d38771) such as backspace & forward delete.
+
+## Build instructions
+- `cd /path/to/qmk_firmware`
+- Ensure latest libraries are loaded `make git-submodule`
+- Build & flash : `make converter/usb_usb:narze:flash`