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

babel.config.js

@@ -1,3 +1,4 @@
 module.exports = {
-  presets: [["@babel/preset-env", { targets: { node: "current" } }], "@babel/preset-react", "@babel/preset-typescript"]
+  presets: [["@babel/preset-env", { targets: { node: "current" } }], "@babel/preset-react", "@babel/preset-typescript"],
+  plugins: [["@babel/plugin-proposal-decorators", { legacy: true }]]
 };