Use resizable ArrayBuffer for encoding

[pepone]

The current approach is to create a new buffer and copy the data over

ice/js/packages/ice/src/Ice/Buffer.js

Lines 55 to 70 in 85ad556

	reserve(n) {
	if (n > this.capacity) {
	const capacity = Math.max(1024, Math.max(n, 2 * this.capacity));
	if (!this.b) {
	this.b = new ArrayBuffer(capacity);
	} else {
	const b = new Uint8Array(capacity);
	b.set(new Uint8Array(this.b, 0, this._limit));
	this.b = b.buffer;
	}
	this.v = new DataView(this.b);
	} else if (n < this.capacity) {
	this.b = this.b.slice(0, n);
	this.v = new DataView(this.b);
	}
	}

There is a newer API (2024) that allow to resize the buffers directly, this has the advantage of keeping views alive

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/resize

It is already available in all major browsers and JavaScript runtimes, I think makes sense to update the code to use this.

[pepone]

TextDecoder.decode doesn't yet work with resizable buffers in Safari/Firefox. We can keep using non resizable buffers for input streams. Or wait until they are supported see related issue in the spec whatwg/webidl#1385