[Keyboard] Add Specskeys support (#12813)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/specskeys/readme.md

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+# specs_keys - REV 1 
+* Keyboard Maintainer: [specs32](https://github.com/yourusername)
+
+##### TKL ISO keyboard based on an g80-3000HAD
+
+###### Used Hardware :
+  - ATMega 32U4 @ 8 MHz
+  - USB-C jack **with FUSE and full ESD protection**
+  - MOSFET controlled bottom backlighting pads for 14 LEDs with resistors plus 2 extra 2mm connectors for lantern style lightning
+  - Scroll and caps indicators (active low)
+  - SPI interface and reset button
+  - Cherry MX Black Switches
+
+
+##### Build instructions: 
+
+> qmk_firmware [master] » qmk compile -kb specskeys -km default
+
+> % avrdude -c usbasp -p m32u4 -B10 -U lfuse:w:0xD2:m -U hfuse:w:0x98:m -U efuse:w:0xFF:m
+
+> % avrdude -c usbasp -pm32u4 -B10 -Uflash:w:.build/specskeys_default.hex                
+
+
+designed with kicad nightly Version: (5.99.0-10004-g132ec37b56), release build
+
+and some gimp
+
+License on the KiCAD Design files : ♥ CC-BY-SA-4.0
+
+All other parts of this build inherit their Licenses from their origin.
+
+If you want one, please contact me per mail. (Git profile)
+
+![3d-VIEW](https://github.com/specs32/specs_keys/blob/main/gh80-3003-nicosmod/gh80-3003-nicosmod.png)
+
+![PCB](https://github.com/specs32/specs_keys/blob/main/gh80-3003-nicosmod/pcb.png) 
+
+![FOTO1](https://github.com/specs32/specs_keys/blob/main/photo_2021-05-04_18-33-33.jpg)
+
+![FOTO2](https://github.com/specs32/specs_keys/blob/main/photo_2021-05-04_18-33-43.jpg)
+