v0.09: ./compile refactor, bootable toy-musl, pl-init

Eleventh release. Here are the new changes:

• ./compile has been completely refactored and has been split into various modules (ily @raisinware <3)
• Toybox support has been added to pl-musl. This specific configuration is known as pl-toymusl
• pl-init now boots to a respawning shell
• Added some LLVM flags for a future version. Currently unused