Import type only for fixing issue with tsconfig verbatimModuleSyntax

[anirudhsama]

Description

When importing anything from react-native-moengage and when the tsconfig has "verbatimModuleSyntax": true, we get an error when type checking:

../../node_modules/react-native-moengage/src/models/MoEProperties.ts:5:10 - error TS1484: 'MoESupportedAttributes' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

5 import { MoESupportedAttributes } from "./MoESupportedAttributes";
           ~~~~~~~~~~~~~~~~~~~~~~

../../node_modules/react-native-moengage/src/utils/MoEJsonBuilder.ts:11:10 - error TS1484: 'MoESupportedAttributes' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

11 import { MoESupportedAttributes } from "../models/MoESupportedAttributes";
            ~~~~~~~~~~~~~~~~~~~~~~


Found 2 errors in 2 files.

Errors  Files
     1  ../../node_modules/react-native-moengage/src/models/MoEProperties.ts:5
     1  ../../node_modules/react-native-moengage/src/utils/MoEJsonBuilder.ts:11

So this PR fixes it by just importing the type of MoESupportedAttributes