add angular support

[terrablue]

State of affairs

• [x] basic SSR
• [x] props
• [x] including components

Caveats (for the foreseeable future):

• No support for templateUrl and styleUrls (until esbuild implements proper decorator support with angular transforms)
• Default export a class (although most angular files do not seem to export a default component class, see https://angular.io/guide/styleguide#style-01-01)

[terrablue]

done in c13a117