main/postmarketos-ui-phosh: recommend phosh-tour

Put phosh-tour in pmb_recommends instead of having postmarketos-welcome
indirectly installed by default through
postmarketos-base-ui-gnome-mobile. In order to do that, move
postmarketos-welcome from the pmb_recommends of
postmarketos-base-ui-gnome-mobile to postmarketos-ui-gnome-mobile.

The reasons for that is that the postmarketos-welcome app by now has
in part incomplete and outdated explanations about how phosh shall be
used. For example, a common question that we don't answer but phosh-tour
does is how the keyboard can be launched from any app.

The postmarketos-welcome app warns more about that this is an
experimental system, but that is prominently displayed on our homepage
when trying to download images. Otherwise it also doesn't contain much
information that makes it worth keeping instead of phosh-tour.

Finally phosh upstrem has also said that they would be willing to have
distro-specific tour pages, so if we notice that something would be
really good to have there in the long run, we could look into getting it
in phosh-tour.

[ci:skip-vercheck]: changing pmb_recommends doesn't need rebuilds

Signed-off-by: Oliver Smith <ollieparanoid@postmarketos.org>
Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8145>

main/postmarketos-base-ui-gnome-mobile/APKBUILD

@@ -22,7 +22,6 @@ _pmb_recommends="
 	chatty
 	mobile-config-firefox
 	postmarketos-tweaks-setting-definitions
-	postmarketos-welcome
 	ttyescape
 "