Added the Self Serve Data Model (#367)

* added recursion and inition decorators

* working version

* added todo comment and removed console.log

* Added Recursive add

* removed type requirement

* proper resolution of promises

* added custom element and base class

* Made selfServe standalone page

* Added custom renderer as async type

* Added overall defaults

* added inital open from data explorer

* removed landingpage

* added feature for self serve type

* renamed sqlx->example and added invalid type

* Added comments for Example

* removed unnecessary changes

* Resolved PR comments

Added tests
Moved onSubmt and initialize inside base class
Moved testExplorer to separate folder
made fields of SelfServe Class non static

* fixed lint errors

* fixed compilation errors

* Removed reactbinding changes

* renamed dropdown -> choice

* Added SelfServeComponent

* Addressed PR comments

* merged master

* added selfservetype.none for emulator and hosted experience

* fixed formatting errors

* Removed "any" type

* undid package.json changes

src/Contracts/ViewModels.ts

@@ -15,6 +15,7 @@ import DocumentId from "../Explorer/Tree/DocumentId";
 import StoredProcedure from "../Explorer/Tree/StoredProcedure";
 import Trigger from "../Explorer/Tree/Trigger";
 import UserDefinedFunction from "../Explorer/Tree/UserDefinedFunction";
+import { SelfServeType } from "../SelfServe/SelfServeUtils";
 import { UploadDetails } from "../workers/upload/definitions";
 import * as DataModels from "./DataModels";
 import { SubscriptionType } from "./SubscriptionType";
@@ -395,6 +396,7 @@ export interface DataExplorerInputsFrame {
   isAuthWithresourceToken?: boolean;
   defaultCollectionThroughput?: CollectionCreationDefaults;
   flights?: readonly string[];
+  selfServeType?: SelfServeType;
 }
 
 export interface CollectionCreationDefaults {