[Keyboard] added custom keyboard (#6141)

* added keyboard_layout_jopr

* making it compile

* #pragma once instead of #ifndef and #define

* renamed and added keymap

renamed old "default" to "modded_white", added new "default" that resembles an ISO 105-key layout

* reordered keyboards/jopr/info.json to match order o layout array

* implemented most suggestions

* fixed missing ;

* fixed bootloader setting for rules.mk

* adopted standard layout matrix naming convention

* "fixed" commented-out code in keymaps

* changes to keymap layers and LEDs

Turns out adding a layer for ROYA-modified keycodes is more trouble than it's worth and works better by just defining a ROYA key.
Also, LEDs were set up incorrectly.
Lastly, implemented SysReq-Warning LED.

* moved forced NumLock code

just in case either it or the CapsLock & ScrlLock update code wouldn't both work otherwise

* rearranged media keycodes

* replaced Shifted keycodes with basic ones

* Apply suggestions from code review

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>

* implemented suggestions by noroadsleft

* Apply suggestions from code review

Make ISO-Enter QMK Configurator-friendly

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>

* Update readme.md

* Update keyboards/jopr/info.json

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>

* moved keyboard to handwired folder

It was said that personal passion projects belong in there, even if they're not actually handwired

* Update readme.md

keyboards/handwired/jopr/readme.md

@@ -0,0 +1,17 @@
+# jopr-106-Nl2SR-Cl2MH
+
+106-key based on ISO 105-key, NumLock to SysReq, CapsLock to Muhenkan/ROYA, NumLock state forced on
+
+![jopr-106-default](https://raw.githubusercontent.com/joelproko/keyboard_layout_jopr/master/keycode_layout_default.png)  
+![jopr-106-modded_white](https://raw.githubusercontent.com/joelproko/keyboard_layout_jopr/master/keycap_layout_modded_white.png)
+
+Inspired by [KeyBored](https://github.com/itractus/KeyBored) and [white_keyboard_layout](https://github.com/mw8/white_keyboard_layout)
+
+Keyboard Maintainer: [joelproko](https://github.com/joelproko)  
+Hardware: https://github.com/joelproko/keyboard_layout_jopr
+
+Make example for this keyboard (after setting up your build environment):
+
+    make jopr: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).