Potential allowing of supporting text and url

[matthijn]

Hi. So I'm not 100% sure if this is correct, since I'm not quite sure how I can test my own repository here in my app. (Eg do `expo install [my-version-of-the-extension].)

If you could tell me how I could do that I could work a bit further on this to see if this works with adding support for text and urls.

Changes:

• Added the NSExtensionActivationSupportsText flag.
• When passing the url on to open the app, the data is now base64 encoded. (So that any non url allowable characters also work)
• Added a library function to just get the parsed data from the url that opened the app, so you don't have to parse it yourself. which I called useSharedData.

Since I could not test this yet, this is untested. So any help is appreciated. Once it works, we can merge it in if you want.

[timedtext]

how I can test my own repository here in my app.

You can try searching for this keyword "How To Test NPM Packages Locally" on Google.

[timedtext]

I would suggest that we retain the type information of the shared data, as this could be beneficial for future processing purposes.