[Keyboard] new keyboard lovelive9 (#5266)

* new keyboard lovelive9

* Update keyboards/lovelive9/config.h

thank you

Co-Authored-By: ginjake <hsginjake123@gmail.com>
* Apply suggestions from code review

Co-Authored-By: ginjake <hsginjake123@gmail.com>
* fix review

* fix readme

* move handwired

* Update keyboards/handwired/lovelive9/keymaps/default/keymap.c

thanks

Co-Authored-By: ginjake <hsginjake123@gmail.com>
* Apply suggestions from code review

commit suggestion

Co-Authored-By: ginjake <hsginjake123@gmail.com>
* fix spell miss

* fix review

* fix col and row

* fix layout define