(experiment) feat(gems): gems goes multivat

[kumavis]

highlight: durable lazy presences for remote objects via ExtRefController that can lazily trigger their underlying captp connection upon use

requires captp external table support: #2564

see relevant test:

endo/packages/gems/test/extref.test.js

Lines 22 to 32 in f1ea4a3

	const { connect, disconnect } = makeReconnectingCaptpPair({
	kernel,
	bobBootstrap,
	});
	const { aliceCaptp } = connect();
	const bobFacet = await aliceCaptp.getBootstrap();
	t.is(await E(bobFacet).ping(), 'pong');
	disconnect();
	t.is(await E(bobFacet).ping(), 'pong');