[Keyboard] Add jkdlab/binary_monkey (#12374)

Co-authored-by: Ryan <[email protected]>

keyboards/jkdlab/binary_monkey/readme.md

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+# Binary_Monkey
+
+![Binary_Monkey](https://i.imgur.com/0meBVKTh.png)
+
+It is 3-Key macropad, inspired by a monkey. 🐵
+
+* Keyboard Maintainer: [JKDLAB.](https://github.com/jkdlab) [yikolden](https://github.com/LDobac)
+* Hardware Supported: atmega32u4
+* Hardware Availability: [Gumroad](https://gumroad.com/jkdlab)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make jkdlab/binary_monkey:default
+    
+If you want switch to bootloader, unplug the keyboard and plug it back while pressing right upper key(Key 1). 
+    
+Flashing example for this keyboard (You need to keyboard has in bootloader mode) :
+
+    make jkdlab/binary_monkey: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).