Add JAE WP7B series FPC connector size definitions

Hello, I've added the JAE WP7B plug and receptacle connector size definitions.

• Associated MR: kicad-footprints!3746 (merged)
• Receptacle DS: https://www.jae.com/direct/topics/topics_file_download/topics_id=66869&ext_no=06&index=0&_lang=en&v=
• Plug DS: https://www.jae.com/direct/topics/topics_file_download/topics_id=66869&ext_no=06&index=0&_lang=en&v=