~ruther/verilog-riscv-semestral-project

ref: bb32d2ddcd68d2cf131760d9c1d99f9107c912f8 verilog-riscv-semestral-project/testbench d---------
test: add ram test
chore: add makefile for both verilog and c
feat: implement sb, sh, lb, lh support via masking
test: add simple cpu test
test: add basic testbenches
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