[Keyboard] add 3dp660 handwired (#10296)

* Create keymap.c

* Add files via upload

* Added files for handwired 3d printed clueboard 660

* create via layout files

* added layout files for via

* updated product ID to fix id conflicts

* change product ID to fix ID conflicts.

* fixed capitalization error that was causing issues

* fixed capitalization issues.

* fix syntax errors

* Fixed syntax errors (stray punctuation)

* Compatibility fixes

* Compatibility fixes

* Compatibility fixes

* Compatibility fixes

* capitalization fixes

* Compatibility fixes

* Compatibility fixes

* Compatibility Fixes

* Compatibility fixes

* Compatibility fixes

* Compatibility changes

* upkeep, fixing typos

* Update keyboards/handwired/3dp660/config.h

Removed Description line

* Update keyboards/handwired/3dp660/rules.mk

correct bootloader

* Update keyboards/handwired/3dp660/3dp660.h

fix case sensitive typos

* Update keyboards/handwired/3dp660/keymaps/default/keymap.c

change tab indentation to space indentations.

* Update keyboards/handwired/3dp660/keymaps/via/keymap.c

change tab indentations to space indentations

* Delete 3dp660.json

This file was for VIA, and shouldn't be in this repo. I placed it here so I wouldn't misplace it in my filesystem. My apologies.

* Update info.json

change suggestions to other file said to lowercase "ansi", caused reference issues, changed all instances of "ANSI" to "ansi".

* Update keymap.c

change suggestions to other file said to lowercase "ansi", caused reference issues, changed all instances of "ANSI" to "ansi".

* Update keymap.c

more capitalization fixes

* Update keyboards/handwired/3dp660/readme.md

shortened imgur url

* Update keyboards/handwired/3dp660/rules.mk

remove extraneous comments

* Delete config.h

* Update keyboards/handwired/3dp660/rules.mk

* Update 3dp660.c

add license headers to all .c and .h files

* Update 3dp660.h

added license header to all .c and .h files.

* Update keymap.c

added license header to all .c and .h files.

* Update keymap.c

added license header to all .c and .h files.

* Update keyboards/handwired/3dp660/readme.md

Add maintainer URL

* Update keyboards/handwired/3dp660/keymaps/default/keymap.c

remove extraneous default keymap layers

* Update keyboards/handwired/3dp660/keymaps/default/rules.mk

* Update rules.mk

Moved LTO to keyboard level.

* Update rules.mk

Moved LTO to keyboard level.

* Delete rules.mk

Made obsolete by LTO move to keyboard level.

* Update keyboards/handwired/3dp660/rules.mk

capitalization errors.

* Apply suggestions from code review

Housekeeping, changing code for readability.

keyboards/handwired/3dp660/rules.mk

@@ -0,0 +1,23 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = halfkay
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no        # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = yes        # Console for debug
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+LTO_ENABLE = yes