Michael Schimmel
b2e010e755
Add a new example file `examples/def_local_inlining.myc` to demonstrate and test local inlining. Refine the optimizer to handle local inlining more robustly by: - Passing a `SubstitutionMap` to `visit_node` to track local variable substitutions. - Enabling constant propagation for local variables by checking `sub.locals` in `BoundKind::Get`. - Updating `BoundKind::DefLocal` and `BoundKind::Set` to maintain the substitution map for local variables. - Adjusting `try_beta_reduce` to use the optimizer's `visit_node` with the substitution map for inlining. - Re-indexing upvalues correctly when inlining captured variables into lambdas.