Add support for autolink

[philippkuehn]

This PR adds an option autolink to the link mark (enabled by default). It lets you automatically add or remove links as you type.

Features:

• simply typed links like tiptap.dev get a correct url → http://tiptap.dev
• an email address like humans@tiptap.dev get a correct url → mailto:humans@tiptap.dev
• a link will be removed if it’s not a valid url anymore, e.g. if you insert a space tiptap .dev

fixes #1209

preview: https://deploy-preview-2226--tiptap-embed.netlify.app/preview/Marks/Link

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[rfgamaral]

* simply typed links like `tiptap.dev` get a correct url → `http://tiptap.dev`

I think the default should be https and not http, other than that, this looks good to me (feature-wise, didn't look through the code).

[philippkuehn]

@rfgamaral Yes definitely! I’m using linkifyjs and there is an open issue for that. But it’s already fixed in v4. Not sure about a release date.

[hanspagel]

Amazing work @philippkuehn!

Not sure about the https thing! Servers typically redirect http to https, but sites without https can’t redirect to http. So http is probably a better default.

Any feedback on the implementation @maccman?

[philippkuehn]

@hanspagel good point!

[rfgamaral]

So http is probably a better default.

A better default, but one that enables a less secure Web.

@philippkuehn I know it's not possible right now (without linkifyjs v4), but once it's possible, how easy would it be to allow the link extension to have the defaultProtocol option from linkifyjs? That way you can have http as the extension default, and consumers can change it if they want.

[philippkuehn]

Yes, that should be possible.

[ArunGovil]

Is the autolink feature still present in latest releases?

I'm unable to create links while typing unless theres a whitespace followed by the url.

Is this an expected behaviour?

@philippkuehn