feat: Add numbered notation (Jianpu)

[Danielku15]

base renderer + number and accidental calculation

Issues

Fixes #1505

Proposed changes

Adds renderers for numbered notations.

• Base Renderer added
• Rendering of 'key signature' ( 1 = xxx )
• Rendering of correct accidentals
• Rendering of correct numbers
• Rendering of effects (dead notes, ties,..)
• Rendering of note octave
• Rendering of note durations (dots, lines and tuplets)
• Extend test suite

Checklist

• I consent that this change becomes part of alphaTab under it's current or any future open source license
• Changes are implemented
• Existing builds tests pass
• New tests were added

Further details

• This is a breaking change
• This change will require update of the documentation/website