[proggeramlug]

Closes #2905
Closes #2889

#2905 — standard global function values on globalThis

parseInt, parseFloat, isNaN, isFinite, encodeURI, decodeURI, encodeURIComponent, and decodeURIComponent are now function-valued properties on globalThis with real dispatch. Reading them (globalThis.parseInt, bare const p = parseInt) yields a callable closure (typeof === "function"), and calling that closure goes through Perry's existing runtime helpers — matching Node.

Implementation:

• Runtime: added thunks in object/global_this.rs delegating to js_parse_int / js_parse_float / js_is_nan / js_is_finite / js_encode_uri* / js_decode_uri*, and listed the names in GLOBAL_THIS_BUILTIN_FUNCTIONS with their dispatch arms.
• Codegen: added the names to is_global_this_builtin_name so globalThis.<name> property reads route through the singleton instead of the 0.0 sentinel.
• HIR: added the names to is_builtin_global_value_name so a bare value read (const p = parseInt) lowers to PropertyGet { GlobalGet, name }. Bare calls (parseInt(x)) are still picked off earlier by try_global_builtins → Expr::ParseInt/etc., so the call fast paths are unchanged.

#2889 — rebound global builtin constructors through real semantics

• Call-form thunks for Number/Boolean (Object/String already had them): const N = Number; N("42") → 42, const B = Boolean; B(0) → false.
• js_new_function_construct now constructs through a rebound global value for Error and its subclasses (TypeError/RangeError/ReferenceError/SyntaxError/EvalError/URIError), RegExp, and all typed arrays (Uint8Array, …). Array/Object/Date were already handled.
• Installed common static methods on the Object constructor closure (keys/values/entries/freeze/create/getPrototypeOf/getOwnPropertyNames/fromEntries/assign) and the Array closure (isArray/from/of), so const O = Object; O.keys(x) and Array.isArray(new A(1)) dispatch through the real helpers.

Validation

Gap test test-files/test_gap_global_builtins_2905_2889.ts is byte-identical to node --experimental-strip-types under the DEFAULT auto-optimize compile. Covers typeof globalThis.<fn>, const p = parseInt; p("42px"), const A = Array; new A(2).length / Array.isArray(new A(1)), const O = Object; O.keys({a:1,b:2}), and rebound Number/String/Boolean call-form. Additional manual checks (rebound TypeError/Uint8Array/RegExp construct, direct-call non-regression) also match Node.

cargo test -p perry-hir and cargo test -p perry-runtime object:: green; cargo fmt --all -- --check clean; ./scripts/check_file_size.sh exit 0 (no file pushed over the 2000-line cap). No new HIR variant, no new #[no_mangle] fn (thunks are referenced by pointer from live code), no manifest/docs change.

Scope notes (not in this PR)

• escape / unescape global functions: Perry has no runtime helper for the legacy %XX escape codec yet, so they remain unimplemented (a separate runtime addition).
• Wrapper-object construct (new Number(x) / new Boolean(x) / new String(x) returning a boxed object): Perry does not model primitive wrapper objects, so the rebound new-form for these falls back to the existing behavior. Call-form coercion (the common case) works.
• The long tail of Object statics (defineProperty, getOwnPropertyDescriptor, setPrototypeOf, …) is not reified on the rebound constructor value; direct Object.defineProperty(...) is unaffected.