VoodooTracker X v0.2.0-alpha.2

What's Changed

• docs: add editor window design mockups by @syncomm in #285
• ui: add shared editor control primitives by @syncomm in #286
• ui: add editor knob and center-detent pan slider controls by @syncomm in #287
• editor: suppress key repeat note mutations by @syncomm in #288
• ui: add Song / Order editor window shell by @syncomm in #289

Full Changelog: v0.2.0-alpha.1...v0.2.0-alpha.2