[Keyboard] HHKB Lite 2 (#9188)

* Initial commit for HHKB Lite 2

* Rearrange keymap

* Clean up config

* Fix pin assignments

* Code and filename cleanup

* Add README

* Apply suggestions from code review

Code cleanup

* Update keyboards/hhkb_lite_2/README.md

Documentation cleanup

* Change Vendor ID to unused

* One more LAYOUT

* Via keymap for HHKB Lite 2

* Remove redundant keymap.c

* Add README for Via keymap

* Fix vendorId for Via keymap

* Apply suggestions from code review

Cleanup based on review feedback

* Clean up via keymap makefile rules

* Switch to C keymap instead of JSON for Via layout

* Move bootmagic key config to main

Moved to main keyboard config to be shared by all keymaps.

* Address PR feedback

* Reformat config comments

* Format rules.mk comments

* Rename README -> readme

* Use `make` instead of `qmk` in examples

keyboards/hhkb_lite_2/rules.mk

@@ -0,0 +1,23 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = halfkay
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # 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
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+UNICODE_ENABLE = yes