Add declaration files to build output

[ChromeQ]

Description

One Line Summary

Add declaration files so I can import types for plugin config

Details

Motivation

Currently I do something like this:

import {
  OneSignalPluginProps as ExpoOneSignalPluginConfig,
  Mode as ExpoOneSignalPluginMode,
} from '@chromeq/onesignal-expo-plugin/build/types/types'; // 👈️ Note `chromeq` is my fork of this repo to let this happen

// The only way currently it can work now is with the following: But Enum for mode won't work and isn't type safe as it comes in an `any` 😢
// import withOneSignalPlugin from 'onesignal-expo-plugin/build/onesignal/withOneSignal';
// type ExpoOneSignalPluginConfig = Parameters<typeof withOneSignalPlugin>[1];

// config 👇️
[
        'onesignal-expo-plugin',
        {
          mode:
            process.env.APP_PROFILE === 'production'
              ? ExpoOneSignalPluginMode.Prod
              : ExpoOneSignalPluginMode.Dev,
        } satisfies ExpoOneSignalPluginConfig, // 👈️ This is now type safe object and I get intellisense
      ],

Checklist

Overview

• I have filled out all REQUIRED sections above
• PR does one thing

Testing

• I have personally tested this on my device, or explained why that is not possible
• I have tested this on the latest version of the plugin
• I have tested this on both Android and iOS, or explained why that is not possible

Final pass

• Code is as readable as possible.comments to the code.
• I have reviewed this PR myself, ensuring it meets each checklist item