fix(#774): resolve super.<prop> value form via parent vtable lookup

[TheHypnoo]

Summary

Closes #774. Value-form super.<prop> was lowered to this.<prop> in PR #754 (crates/perry-hir/src/lower/expr_misc.rs::lower_super_prop), so a child override silently shadowed the parent. Strict JS resolves the read through the parent's prototype.

What changed

• HIR: new Expr::SuperPropertyGet { property } variant. Ident-form super.foo lowers to it; computed super[expr] keeps its this[expr] fallback (out of scope here).
• Codegen (Expr::SuperPropertyGet in crates/perry-codegen/src/expr.rs): walks the parent class chain in ctx.classes / ctx.methods. When a parent declares a method <prop>, materializes it as a closure value via js_closure_alloc_singleton (mirroring Expr::FuncRef); otherwise returns undefined.
• Method closure wrappers: emits __perry_wrap_<method> for every class instance method in compile_module, alongside the existing hir.functions wrapper loop. Forwards to perry_method_<…>(this_box, args) with this=undefined, matching strict-JS plain-invocation semantics for const fn = super.greet; fn(arg).

Call-form super.method(args) continues to route through Expr::SuperMethodCall unchanged — the rxjs / NestJS canaries from PR #754 are unaffected.

Validation

• node --experimental-strip-types test-files/test_super_property_override.ts → undefined
• ./target/release/perry test-files/test_super_property_override.ts -o /tmp/t && /tmp/t → undefined
• ./run_parity_tests.sh --filter test_decorators — all NestJS decorator canaries from PR Add legacy TypeScript decorator metadata support #754 PASS (test_decorators_nest_js_common_canary is a pre-existing compile failure unrelated to this PR).
• ./run_parity_tests.sh --filter test_super / --filter test_inherit — all PASS.
• cargo fmt --check

Test plan

• CI parity job green.
• CI cargo-test green.