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

package-lock.json

@@ -156,9 +156,9 @@
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@@ -739,6 +757,14 @@
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