chore: remove unnecessary executable flags

Closes #4.

Merge pull request #1 from Rutherther/feat/pipeline

Implement pipeline

feat: implement pipeline

fix: lui, force rs1 zero, always add

feat: implement ebreak

Breaks the processor, can
exit the testcase

feat: implement sb, sh, lb, lh support via masking

fix: make sure alu is zeroed on memory load, write, jump

fix: force alu operation to addition for storing memory and pc

fix: propagate conditional jump from control_unit

feat: add control_unit wrapper over instruction_decoder