Keyboard rura66 (#15853)

* add : BlackMask60 and MayShi.No30

* fix:spell miss

* change:keyboard name area

* change: default keymap

* 配列を自分用に変更

* MyKemap Update

* 構成変更

* Add RURA66 new keyboard

* remove additional files

* fix file

* fix info.json from rura66

* fix KC_LANG to KC_LNG from rura66

* Fix readme
- fix purchase URL
- adjust to the recent standard

* Fix rules.mk
- no backlight
- remove DIP switch/Bluetooth
- OLED_DRIVER_ENABLE -> OLED_ENABLE

* Fix rura66.h: add LICENSE

* Fix config.h
- UNUSED_PINS is deprecated
- accept suggestion on PR

* Fix oled_display.c
- remove snprintf()
- OLED_DRIVER_ENABLE->OLED_ENABLE
- oled_task_user() returns false

* Fix config.h
- no SPLIT_HAND_MATRIX_GRID
- no RGB Matrix

* move default keymap readme

* add VIA keymap

* Fix info.json
- Fix keyboard URL
- Change VID/PID

* Fix comments in rules.mk

* fix info.json keyboard url

Co-authored-by: yswallow <1426202+yswallow@users.noreply.github.com>

keyboards/rura66/readme.md

@@ -0,0 +1,35 @@
+# RURA66
+
+![RURA66](https://github.com/ShinoharaTa/keyboards/blob/master/RURA66/manual/images/IMG_0236.jpg)
+
+これは66キー備えた、シンプルな左右分割型キーボードです。あなたの肩への負担軽減をサポートします。
+
+This is a simple left / right split keyboard with 66 keys. Supports reducing the burden on your shoulders.
+
+* Keyboard Maintainer: [T.Shinohara](https://github.com/ShinoharaTa)
+* Hardware Supported:  The RURA PCB, ProMicro supported. Using Cherry MX Profile Switches.
+* Hardware Availability: [Booth (Japanese Site)](https://shino3.booth.pm/items/2643797)
+* 日本国内ではBoothで入手できます: [Booth (Japanese Site)](https://shino3.booth.pm/items/2643797)
+
+![RURA66-USE](https://github.com/ShinoharaTa/keyboards/blob/master/RURA66/manual/images/IMG_0211.jpg?raw=true)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make rura66:default
+
+Flashing example for this keyboard:
+
+    make rura66:default:flash
+
+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).
+
+## Bootloader
+
+Enter the bootloader in 2 ways:
+
+* **Physical reset button**: Briefly press the button on the next to the TRRS jack.
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available
+
+## Build Guide
+
+[Build guide - Japanese](https://github.com/ShinoharaTa/keyboards/blob/master/RURA66/manual/build_guide_ja.md)