universal support

[NathanWalker]

• xplat/ssr for shared universal bits as well as nest integrations
• universal app generation or targeting of existing apps for universal integration

[bohushvitali]

It could be more powerful to also make ng-udkc integration

The found benefits are

• Faster development cycle with server hot reload
• Exporting server from bundle produced by build-angular:server to avoid extra node application
• udk-builder provides partialServerConfig option when it comes to necessity to include/exclude certain dependencies due to memory/space quotas for Firebase functions

Universal Development Kit https://github.com/enten/angular-universal

Nest + Angular Universal https://github.com/kamilmysliwiec/universal-nest