* Refactor helix/rev3_{4,5}rows
rev3_4rows and rev3_5rows are identical, except for the extra row users
can snap off of their PCBs.
- Add alias for rev3_4rows
- Migrates legacy defines and configuration to keyboard.json
- Tidy's keymap and migrates to JSON
- Removes RGB Light configuration, enables RGB Matrix
- Removes DIP switch configuration, as they do not appear to be present
on PCBs
- Adds an alternate 4 row layout for snappable PCB
- Tidy's up OLED code
- Enables standard features (bootmagic, extrakey, etc.)
* Alias for rev3_5rows -> rev3
* Add product URL
* Replace mistakenly removed DIP switch configuration
* Remove rebase artifact
