BridgeJS: Add JSTypedArray convenience typealiases as recognized types

[krodak]

Overview

Add JSTypedArray<T> as a recognized BridgeJS type, so users can use typed arrays directly in @JS function signatures. Both the generic form and convenience typealiases are supported:

// Generic form
@JS func processData(_ data: JSTypedArray<UInt8>) -> JSTypedArray<UInt8> { ... }

// Convenience typealias (equivalent)
@JS func processData(_ data: JSUint8Array) -> JSUint8Array { ... }

Both generate identical TypeScript:

processData(data: Uint8Array): Uint8Array;

Bridging is reference-based — passes the JSObject ID across the boundary with no data copying. The TypedArray lives on the JS heap.

This complements the separate numeric array optimization PR (#8) which makes [Int]/[Double] faster internally while keeping number[] in TypeScript. This PR gives users the option to use actual TypedArray types when they need them (e.g., for fetch body, WebGPU).

What changed

• JSTypedArray.swift — 8 convenience typealiases: JSInt8Array, JSUint8Array, JSInt16Array, JSUint16Array, JSInt32Array, JSUint32Array, JSFloat32Array, JSFloat64Array
• SwiftToSkeleton.swift — Pre-seed typed array types in the type resolver (same pattern as JSPromise). Recognize JSTypedArray<T> generic form and map to the corresponding typealias.
• BridgeJSLink.swift — Map Swift typealias names to JS TypedArray constructor names in tsType (e.g., JSUint8Array → Uint8Array)
• Tests — JSTypedArrayTypes.swift test input covering both typealias and generic forms

Type mapping

Swift	TypeScript
JSTypedArray<Int8> / JSInt8Array	Int8Array
JSTypedArray<UInt8> / JSUint8Array	Uint8Array
JSTypedArray<Int16> / JSInt16Array	Int16Array
JSTypedArray<UInt16> / JSUint16Array	Uint16Array
JSTypedArray<Int32> / JSInt32Array	Int32Array
JSTypedArray<UInt32> / JSUint32Array	Uint32Array
JSTypedArray<Float> / JSFloat32Array	Float32Array
JSTypedArray<Double> / JSFloat64Array	Float64Array