Add documentation on Link Capturing in web apps

[joycetoh8]

Is your feature request related to a problem? Please describe. With the previous Declarative Link Capturing API being replaced by Link Capturing and the Launch Handler API, we should have documentation on chromeos.dev so developers are aware.

Describe the solution you'd like Either a blog post under "News & Stories" or a page under "Apps & Games" -> "Adapting Web".

Describe alternatives you've considered There is documentation on web.dev (https://web.dev/launch-handler/)

[Snugug]

@joycetoh8 did we ever do this?

[joycetoh8]

Yes, we have an article under news at https://chromeos.dev/en/posts/customize-pwa-window-launch