HMR for examples

[mattjennings]

Currently we trigger a full page reload when the example is edited

mdsvexamples/src/lib/plugin.js

Lines 94 to 101 in 8f2e1fa

	handleHotUpdate() {
	// reload page when example is updated - would be nice to trigger HMR on owner svelte component instead
	Object.keys(examples).forEach((key) => {
	viteServer.moduleGraph.invalidateModule(viteServer.moduleGraph.getModuleById(key))
	viteServer.ws.send({
	type: 'full-reload'
	})
	})

it would be nice to HMR these changes instead, but I'm not sure how that works with virtual files.