Keyboard annepro2 bidir led comms

[tech2077]

Isolated PR for bidirectional shine comms from PR #3

• Split led functions into their own file
• Preserve original functionality in existing keymaps
• Faster led startup time moving shine initialization into pre_init

[iojcde]

Ok your implementation is much better than mine, closing my pull request at https://github.com/OpenAnnePro/qmk_firmware/pull/4