[Keyboard] NK87 (#9965)

* Initial commit

* Fix1

* Final Prettify

* Update keyboards/nk87/config.h

* Update keyboards/nk87/keymaps/default/keymap.c

* Update keyboards/nk87/keymaps/via/keymap.c

* Update keyboards/nk87/rules.mk

* Remove unnecessary junk

* Update keyboards/nk87/readme.md

* Update keyboards/nk87/readme.md

* Update keyboards/nk87/readme.md

* Update keyboards/nk87/keymaps/default/readme.md

* Update keyboards/nk87/keymaps/via/readme.md

keyboards/nk87/readme.md

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+# NK87
+
+![NK87](https://i.imgur.com/nw29fvc.png)
+
+This is a standard fixed layout TKL PCB. It supports VIA and full per-key RGB.
+
+* Keyboard Maintainer: [Yiancar](https://yiancar-designs.com/) and on [GitHub](https://github.com/yiancar)
+* Hardware Supported: A TKL keyboard with STM32F303CC
+* Hardware Availability: https://novelkeys.xyz/
+
+## Instructions
+
+### Build
+
+Make example for this keyboard (after setting up your build environment):
+
+    make nk87: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).
+
+### Reset
+
+- Unplug
+- Hold Escape
+- Plug In
+- Unplug
+- Release Escape
+
+### Flash
+
+- Unplug
+- Hold Escape
+- Plug In
+- Flash using QMK Toolbox or dfu-util (`make nk87:<keymap>:dfu-util`)