FilmCraft guides

1. 01How to install FilmCraft on macOS, Windows and LinuxWhich FilmCraft 0.6.0 file to download for your OS and CPU, how to verify it, and how to build FilmCraft from source. Based on the official README and the v0.6.0 release.
2. 02FilmCraft: a free, open-source Adobe Premiere Pro alternativeWhat FilmCraft 0.6.0 is, what it already does, and where it still falls short of Adobe Premiere Pro. Based only on the official FilmCraft README and docs.