Mappings for Pioneer DDJ SB3 Controller (#3821)

* add mappings for Pioneer DDJ SB3

* remove license notice

* fix eslint warning

* reference functions directly

* fix mixxx min version

* add wiki, manual and forums information

* remove unused setting

* pass in actual function

* fix redeclare issue

* remove copyright notice

* reorder and style fix

* reorder and fix style

* remove unused property

* consolidate function code

* remove unnecessary code

* fix redeclare error

* add newline

* remove shifted headphone control

Co-authored-by: Swiftb0y <[email protected]>

* remove call to shift on headphone

* replace led array with start plus index

* replace "manual" toggle with built in function

* add comment to clarify use of component

* fix line endings

* remove flashing of play button while paused

* remove non-standard uses of knobs

* add improvement suggestion

* replace padmode magic numbers with "enum"

* fix version

* move padmode after user options

* enable hotcues 5-8

* fix spelling

* remove mapping of the haedphones and master levels

* fix spelling

* fix whitespace

Co-authored-by: Swiftb0y <[email protected]>