feat(marketplace): extract common components (#1338)

* feat(marketplace): extract common components

* chore: fix service provide

* feat(markdown): allow Observable content

* chore: remove unnecessary module import

* minor styling for marketplacee list

* only show loading for marketplace show if version change

* chore: get rid of unnecessary server request

* chore: fix version switching

Co-authored-by: Matt Hill <matthewonthemoon@gmail.com>

frontend/projects/ui/src/app/services/api/embassy-api.service.ts

@@ -1,3 +1,4 @@
+import { AbstractApiService } from '@start9labs/shared'
 import { Subject, Observable } from 'rxjs'
 import {
   Http,
@@ -13,7 +14,10 @@ import { DataModel } from 'src/app/services/patch-db/data-model'
 import { RequestError } from '../http.service'
 import { map } from 'rxjs/operators'
 
-export abstract class ApiService implements Source<DataModel>, Http<DataModel> {
+export abstract class ApiService
+  extends AbstractApiService
+  implements Source<DataModel>, Http<DataModel>
+{
   protected readonly sync$ = new Subject<Update<DataModel>>()
 
   /** PatchDb Source interface. Post/Patch requests provide a source of patches to the db. */
@@ -24,9 +28,6 @@ export abstract class ApiService implements Source<DataModel>, Http<DataModel> {
       .pipe(map(result => ({ result, jsonrpc: '2.0' })))
   }
 
-  // for getting static files: ex icons, instructions, licenses
-  abstract getStatic(url: string): Promise<string>
-
   // db
 
   abstract getRevisions(since: number): Promise<RR.GetRevisionsRes>