Support generic action/deep link formats

[kaerez]

Support the regex below, which supports other valid links such as:
sms:+12125551212
call:2125551212
whatsapp://send
com.acme.a1t-3://license?set=1f6R@!a

Applicable regex: ([\S]+:[\S]+)

[linear]

ENG-444 Support generic action/deep link formats

[steven-tey]

We do have the isSupportedDeepLinkProtocol check which supports most of the examples here, but we're wary of opening it up to a generic regex in case of abuse. Any thoughts/advice here?

[kaerez]

Deeplinks are officially supported in RFC's and by Google and Apple. Any HTML can have a meta redirect, shadow (reporting) link, direct href link, etc...
I think, at least for custom domains, this should be permitted. This could also be an opportunity to possibly support adding a permissive and/or restrictive regex to the ui for admins.