TypeScript Support added

[Ananthakr]

To support absolute type schema check at function calling time by initializing the export with schema rather than passing it during function call. This makes sure the key passed to get/set is within the schema and takes the relevant type from the schema.

import pandora from "@faizaanceg/pandora";

type StorageSchema = {
   username: string;
}

let pandora: pandora<StorageSchema>

pandora.set("username", "pandora"); // this'll work
pandora.set("username",  1); // this should fail

let name: string = pandora.get("username"); // this'll work
let name: string = pandora.get("username", "pandora"); // this'll work
let name: string = pandora.get("username", 1); // this should fail

Related issue - #1