Support ng-add schematics

[doggy8088]

Description of the Issue and Steps to Reproduce:

Did you search for duplicate issue? Yes

Please describe the issue and steps to reproduce, preferably with a code sample / plunker:

Would you like to add ng-add schematics into this repo?

Ensure your issue is isolated to ngx-moment. Issues involving third party tools will be closed unless submitted by the tool's author/maintainer.

Environment:

Please answer the following questions:

• Angular version? 8.2.14
• TypeScript version? 3.5.3
• moment version?
• Are you using moment-timezone?
• Are you using the angular-cli?
• Using Rollup/Webpack/System.js/Ionic/similar?

[PrathameshAshra]

Hi, is some help wanted here?
I would like to contribute, can you give me a heads-up?