V.E.L.O.C.I.T.Y.-OS JIT Gains Compiler Optimization Passes in Series Part 7

The seventh installment of the V.E.L.O.C.I.T.Y.-OS development series details the addition of classic compiler optimization passes to the project's JIT compiler. Four passes were implemented directly on the AST in src/compiler/nda_jit.rs before machine code emission, targeting redundant or unnecessary operations. These include constant folding, which evaluates static expressions like Add(5,3) at compile time, and constant propagation, which replaces variable loads with known constant values. Loop unrolling for small static-count loops was also added, alongside dead code elimination to remove unused nodes. The goal is to produce smaller and cleaner x86-64 machine code output from the JIT pipeline.