[Keyboard] added Pill60 to handwired/pill60 (#10798)

* added to handwired pill60

* Update keyboards/handwired/pill60/config.h and all other PR suggested changes

Deleted DESCRIPTION

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

Update keyboards/handwired/pill60/readme.md

Smaller image in readme

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

Update keyboards/handwired/pill60/info.json

Deleted key_count

Co-authored-by: Ryan <fauxpark@gmail.com>

Update keyboards/handwired/pill60/keymaps/default/keymap.c

Deleted backslash on keymap.c

Co-authored-by: Ryan <fauxpark@gmail.com>

Update keyboards/handwired/pill60/pill60.h

Deleted led.h

Co-authored-by: Ryan <fauxpark@gmail.com>

Update keyboards/handwired/pill60/blackpill_f401/rules.mk

Update stm32f401 rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

Update keyboards/handwired/pill60/blackpill_f411/rules.mk

Update stm32f411 rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

Update keyboards/handwired/pill60/bluepill/rules.mk

Update bluepill rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

Update keyboards/handwired/pill60/rules.mk

Added comment on rules.mk to help ]

Co-authored-by: Ryan <fauxpark@gmail.com>

deleted bootloader_defs.h

added GPL2 + compatible license header

updated keymap readme

updated those that don't need common_config.h and deleted some unnecessary spaces in f411/rules.mk

updated default folder in rules.mk

* fix and simplify build files according to onekey example

* Added GPL2+ Compatible license header

keyboards/handwired/pill60/keymaps/default/readme.md

@@ -0,0 +1,6 @@
+![Pill60 Layout Image](https://i.imgur.com/LIW18XJ.png)
+
+# Default Pill 60 Layout
+
+This is the default layout that comes flashed on every 60% board. For the most
+part it's a straightforward and easy to follow layout. Except the backspace is split, and right shift is split.