OZG-5012 migrate resource service to ngrx PoC, working for alfa and admin

alfa-client/apps/admin/src/app/app.module.ts

...admin-settings/src/lib/admin-settings-resource.service.ts

...ient/libs/admin-settings/src/lib/admin-settings.module.ts

...ent/libs/admin-settings/src/lib/admin-settings.service.ts

...s/src/lib/configuration/configuration-resource.service.ts

...fach/postfach-container/postfach-container.component.html

...stfach/postfach-container/postfach-container.component.ts

.../postfach-container/postfach-form/postfach.formservice.ts

...in-settings/src/lib/postfach/postfach-resource.service.ts

...s/bescheid-shared/src/lib/+state/bescheid.reducer.spec.ts

...t/libs/bescheid-shared/src/lib/+state/bescheid.reducer.ts

...bescheid-shared/src/lib/+state/bescheid.selectors.spec.ts

...libs/bescheid-shared/src/lib/+state/bescheid.selectors.ts

...nt/libs/bescheid-shared/src/lib/bescheid-shared.module.ts

...ent/libs/bescheid-shared/src/lib/bescheid.service.spec.ts

alfa-client/libs/bescheid-shared/src/lib/bescheid.service.ts

...s/command-shared/src/lib/command-resource.service.spec.ts

...t/libs/command-shared/src/lib/command-resource.service.ts

...ient/libs/command-shared/src/lib/command.rxjs.operator.ts

alfa-client/libs/tech-shared/src/index.ts