add readme files

keyboards/yandrstudio/cool87/readme.md

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+Cool87
+===
+
+A 80% keyboard.
+
+Keyboard Maintainer: QMK Community 
+Hardware Supported: cool87 
+Hardware Availability: https://github.com/Oh-My-Mechanical-Keyboard 
+
+Make example for this keyboard (after setting up your build environment):
+
+ make yandrstudio/cool87:default
+
+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.

keyboards/yandrstudio/nlhhkb/readme.md

@@ -1,14 +1,14 @@
-AMJ60
+nlhhkb
 ===
 
 A 60% keyboard.
 
 Keyboard Maintainer: QMK Community 
-Hardware Supported: AMJ60 
-Hardware Availability: https://geekhack.org/index.php?topic=77636.0  
+Hardware Supported: nlhhkb 
+Hardware Availability: https://github.com/Oh-My-Mechanical-Keyboard 
 
 Make example for this keyboard (after setting up your build environment):
 
- make amj60:maximized
+ make yandrstudio/mlhhkb:default
 
 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.

keyboards/yandrstudio/rainbow65/readme.md

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+rainbow65
+===
+
+A 65% keyboard with rgb oled and encoder.
+
+Keyboard Maintainer: QMK Community 
+Hardware Supported: rainbow65 
+Hardware Availability: https://github.com/Oh-My-Mechanical-Keyboard 
+
+Make example for this keyboard (after setting up your build environment):
+
+ make yandrstudio/rainbow65:default
+
+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.

keyboards/yandrstudio/sb65p/readme.md

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+sb65p
+===
+
+A wireless split 60% keyboard.
+
+Keyboard Maintainer: QMK Community 
+Hardware Supported: sb65p
+Hardware Availability: https://github.com/Oh-My-Mechanical-Keyboard 
+
+Make example for this keyboard (after setting up your build environment):
+
+ make yandrstudio/sb65p:default
+
+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.