feat(server-renderer): move and adapt old SSR code

[unstubbable]

This is the first iteration of the server renderer feature service.

Things to consider and/or fix:

• Can we avoid using setTimeout in unit tests, and/or use jest.useFakeTimers()?
• Move rerenderWait to config, remove default in ServerRenderer constructor.
• Add a test scenario for when a feature app module fails to load.
• Throw an error when renderUntilCompleted is called more than once.

Tasks for follow-up PRs:

• Test rerenderWait (and debounce functionality) with fake timers. SSR: test rerenderWait (and debounce functionality) with fake timers #153
• Rename package to async-ssr-manager. SSR: Rename server-renderer package to async-ssr-manager #154
• Handle a global render timeout. SSR: Handle a global render timeout #155
• Add documentation. SSR: Add documentation #156
• Integrate into FeatureAppLoader. SSR: Integrate Async SSR Manager into FeatureAppLoader #157
• Handle timeouts per loading feature app module.
• Add JSDoc comments. SSR: Add JSDoc comments #158
• Move the request to its own service

every comment is resolved, and fahrradflucht approved