Make SSR create function async

[yusufkandemir]

In order to use Fastify with SSR, you would need to use a compatibility layer such as @fastify/middie or @fastify/express. That is because Quasar uses and expects connect/express-like middleware. However, the registration process for those plugins is async, which is problematic as create is expected to be synchronous.
https://github.com/fastify/middie#usage

For the dev web server, we should be able to just put an await here:

quasar/app-vite/lib/modes/ssr/ssr-devserver.js

Line 317 in 36146ba

const app = middlewareParams.app = create(middlewareParams)

For the production web server, we should be able to move the create call and app interaction logic into isReady which is async.

quasar/app-vite/templates/entry/ssr-prod-webserver.mjs

Lines 147 to 160 in 36146ba

	const app = create(middlewareParams)
	// fill in "app" for next calls
	middlewareParams.app = app
	<% if (ssr.pwa) { %>
	// serve the service worker with no cache
	app.use(resolveUrlPath('/<%= pwa.swFilename %>'), serveStatic('<%= pwa.swFilename %>', { maxAge: 0 }))
	<% } %>
	// serve "client" folder (includes the "public" folder)
	app.use(resolveUrlPath('/'), serveStatic('.'))
	const isReady = () => injectMiddlewares(middlewareParams)