dmnt-cheat: continue fleshing out cheat manager code

dmnt-cheat: flesh out new process logic

dmnt-cheat: Skeleton cheat manager

dmnt: Skeleton cheat service API.

tma: First pass at tio file read/write

dmnt: Add remaining TargetIO_File* funcs

dmnt: Add TargetIO_Open/Close/Read/Write funcs.

dmnt: Implement three more easy commands

dmnt: Skeleton real process implementation.

dmnt: Create Makefile/Process folder.