handwired/qc60: refactor, Configurator update, and readme update (#4878)

* handwired/qc60: refactor and Configurator update

- correct layout macro name (LAYOUT_ANSI_DEFAULT to LAYOUT_ansi_default)
- add layout data for remaining layout macros
- correct ISO layout macros (neither had a split left Shift)
- refactor LAYOUT_iso_alt (place KC_NUHS key on home row; consistent with LAYOUT_iso_default)
- proto.h refactored to use #pragma once include guard

* handwired/qc60: keymap refactor

- delete redundant KC_TRNS and KC_NO aliases

* handwired/qc60: readme update

- update header (made consistent with QMK template)
- update Docs links (Newbs Guide; grammar)

keyboards/handwired/qc60/README.md

@@ -1,5 +1,4 @@
-QC60
-========
+# QC60
 
 ![qc60 layout](https://i.imgur.com/BAW1VGc.png)
 
@@ -19,4 +18,4 @@ Example of flashing this keyboard:
 
     make handwired/qc60/proto:avrdude
 
-See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).