Introduce new imageFromFile API function signature

[raedle]

Summary: Introduce new media API to get an image from a filepath.

Example with RNFS (react-native-fs) to get a valid filepath.

import { media } from 'react-native-pytorch-core';
import * as RNFS from 'react-native-fs';

const image = media.imageFromFile(
  RNFS.DownloadDirectoryPath + '/saved_image.png',
);
// do something with image

Differential Revision: D40747568

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Name	Status	Preview	Updated
playtorch	✅ Ready (Inspect)	Visit Preview	Jan 13, 2023 at 6:02AM (UTC)

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D40747568

[facebook-github-bot]

This pull request has been merged in facebookresearch/playtorch@0f0ed9647ebe787dbca210f5b773f56dd5f3a701.