cpu: review 1

build.ninja

fig/cpu/slide-electronic-component.svg

fig/cpu/slide-instr-0-0.svg

fig/cpu/slide-instr-0-2.svg

fig/cpu/slide-instr-0-3.svg

fig/cpu/slide-instr-0-4.svg

fig/cpu/slide-instr-1-1.svg

fig/cpu/slide-instr-2-1.svg

fig/cpu/slide-instr-2-2.svg

fig/cpu/slide-instr-3-1.svg

fig/cpu/slide-instr-3-2.svg

fig/cpu/slide-instr-4-1.svg

fig/cpu/slide-instr-4-2.svg

fig/cpu/slide-instr-4-3.svg

fig/cpu/slide-instr-4-4.svg

fig/cpu/slide-instr-4-6.svg

fig/cpu/slide-instr-4-7.svg

fig/cpu/slide-instr-5-0.svg

fig/cpu/slide-instr-intro-0.svg

fig/cpu/slide-instr-intro-1.svg