Chromium-mir-kiosk snap set using strict confinment

[alan_g]

A couple of things:

1. chromium-mir-kiosk was a proof of concept, not a supported solution and is unmaintained. Please see if wpe-webkit-mir-kiosk suits your needs.
2. The snap command is not available from a strictly confined environment. There are obvious reasons why allowing snaps to control and install other snaps would be a security concern. (Within a confined snap snapctrl provides some of the same options for that snap.)

Introducing wpe-webkit-mir-kiosk snap

Dear snapcraft community, some have already come across this in the very lengthy [cross-post] chromium-mir-kiosk in portrait mode (rotated mir-kiosk layout) - #15 by tobias thread, but since it’s been a while, I’d like to introduce my snap wpe-webkit-mir-kiosk here and hopefully gather some feedback If you’re interested in the “why” and the bumpy road to a working snap, you can read up on the original thread. To keep things short here: WPE WebKit Snap for Mir in kiosk mode The WPE for…