[Keyboard] Add SharkPCB rev Alpha support (#7090)

[Keyboard] Add SharkPCB rev Alpha support (#7090)

* Add SharkPCB rev Alpha support

* Solve PWM pin assignment

- Solve PWM pin configuration for the SharkPCB rev.Alpha, which backlight pin is B0

* Update shark.c copyright name

* Update shark.h copyright section

* Apply suggestions from code review

Suggestions from @zvecr and @drashna were accepted and applied for neater code. Also fixed typos and removed unused comments. See [pull request](https://github.com/qmk/qmk_firmware/pull/7090/files#diff-70c0a1f44287ae5810170b4180cdaa5d) for more information.

Co-Authored-By: Joel Challis <git@zvecr.com>
Co-Authored-By: Drashna Jaelre <drashna@live.com>
* Update PRODUCT_ID into config.h

* Update metadata info.json

Fields "keyboard_name", "keyboard_folder", "url", "maintainer" were updated