BridgeJS: Fix static method and constructor codegen dropping default parameter values

[krodak]

Overview

Three codegen paths in BridgeJSLink.swift constructed JS parameter lists by joining parameter names directly, ignoring default values. This caused a mismatch where .d.ts declarations correctly marked defaulted parameters as optional (?), but the generated .js omitted the defaults - so calling e.g. MathOperations.subtract(10) from TypeScript would compile but pass undefined at runtime instead of the Swift default.

1. renderEnumStaticFunction and 2. renderStaticMethodForExportObject both used parameters.map { $0.name }.joined(separator: ", ") instead of DefaultValueUtils.formatParameterList(parameters). The fix applies the same pattern already used by constructor codegen and import-side method codegen.

3. Global namespace constructor .d.ts rendering manually formatted constructor parameters without checking param.hasDefault, so the ? marker was missing. Added the optional suffix check inline.

Before:

subtract: function(a, b) {

After:

subtract: function(a, b = 5.0) {

Added an E2E test that calls MathOperations.subtract(10.0) (omitting the defaulted b parameter) and asserts it returns 5.0.