tests: fix simple cpu test to use memory.dump and doesnt wait for ebreak
feat: implement ebreak Breaks the processor, can exit the testcase
feat: make RAM word aligned, add byte_enable Support sb, sh, lb, lh using byte enable instead of non-word aligned reads and writes.
chore: add makefile for both verilog and c
feat: implement sb, sh, lb, lh support via masking
test: add simple cpu test