SoundCraft guides

1. 01How to install SoundCraft on macOS, Windows and LinuxWhich SoundCraft 0.5.0 file to download for your OS and CPU, how to verify it, and how to build SoundCraft from source. Based on the official README and the v0.5.0 release.
2. 02SoundCraft: a free, open-source Avid Pro Tools alternativeWhat SoundCraft 0.5.0 is, what it already does, and where it still falls short of Avid Pro Tools. Based only on the official SoundCraft README and docs.