Keyboard: add support for kbd19x (#4272)

* 60_ansi keymap for DZ60

* 60_ansi keymap for DZ60

Amend author

* 60_ansi keymap for DZ60

* Merge new phantom layout from dev branch

* Initial util/new_project files

* Progress checkpoint (compiles, but untested)

* Progress snapshot, still working on layout graphics

* Add layer images

* Tidy up formatting

* First cut at info.json for kbd19x default layout

* Add default keymap

* add all-keys layout

* clean up documentation

* Update keyboards/kbd19x/info.json

Co-Authored-By: jshuf <44121348+jshuf@users.noreply.github.com>

* Update keyboards/kbd19x/rules.mk

Co-Authored-By: jshuf <44121348+jshuf@users.noreply.github.com>

* Change layout name from default to ansi

keyboards/kbd19x/readme.md

@@ -0,0 +1,19 @@
+# kbd19x
+
+![kbd19x](https://i.imgur.com/0hWTEnh.jpg)
+
+**Layout possibilities for the KBD19x**
+
+![kbd19x](https://i.imgur.com/pVaR2zY.png)
+
+The KBD19x is a compact-1800 keyboard kit produced by KBDfans, offering a number of layout options.
+
+Keyboard Maintainer: [jshuf](https://github.com/jshuf)  
+Hardware Supported: KBD19x PCB  
+Hardware Availability: [KBDfans](https://kbdfans.cn)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make kbd19x:default
+
+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).