Add Zig port of RV32I CPU emulator#12

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Copilot wants to merge 3 commits intomainfrom

copilot/create-zig-port

Commits on Jan 3, 2026

Initial plan
Copilot
committed
Add Zig port implementation

Copilot
and
L3P3
committed
Fix Zig execution speed calculation to use floating point

Copilot
and
L3P3
committed