New Workshop

[felixroos]

This is a complete rework of the first chapter, in respect to many points raised in #515 also available in german

I moved some chapters of the old tutorial to the More section, so nothing is lost.

ideas:

• introduce ideas gradually with practical examples.
• don't show things not learned yet
• non exhaustive: it does not teach everything about a specific topic, just enough that you can start to make music.
• add little idea boxes encouraging you to try stuff out
• no walls of text, make it as self-explanatory as possible

There could still be more chapters + the later chapters could be improved a bit. Things that could be written

• Rhythm: Euclidean Rhythms, Polyrhythms, Polymeter
• Chords: Basic Chord theory + voicings + arpeggios
• using my own samples: easy to follow, step by step instructions for using samples locally or online
• making music with frequencies / microtonal music
• visualization / pianoroll / highlighting

some of those could also be in the more section

additionally, I added some new features:

• compound adsr + ds controls compound adsr control #541
• visualize gain as transparency in pianoroll (same as velocity)
• clamp delay feedback to avoid unstoppable feedback loops
• bring back option+. on mac for stopping
• minirepl header can now be hidden (which is the case in the workshop).. maybe an inline play button would still be nice
• respect missing settings in mini repl (font size / theme / keybindings etc)
• add claviature option to mini repl