docs: better document the stage code, organize it better

docs: document pipeline a bit

chore: import cpu types in stages

chore: recover singlecycle version

feat: add forwarding signal for better debugging

chore: add new files to compilation list

feat: implement pipeline

fix: linker file issues, naming of linked file

fix: use reg for procedural assignments

docs: add basic documentation

chore: update environment description

chore: pass PROGRAM argument to objdump make target

tests: fix ram and control_unit tests to match newest architecture

fix: make Makefile work with memory load, write files

chore: update nixpkgs

tests: fix simple cpu test to use memory.dump and doesnt wait for ebreak

tests: add more custom tests

chore: extend memory

chore: pass in full trace file instead of program name

tests: add register dump, printing