Adding the Quick Tour

* Add a link to the Quick Tour to the desktop.
* Remove the Welcome page from desktop. We don't want to clutter
  the user's desktop more than necessary. As "Home" page of
  WebPositive, it's still very visible.
* Mention the Quick Tour in the Welcome package description.
* Add a "quicktour" script similar to the welcome/userguide
  that opens the online version if it's not installed locally.
* Add icons to the userguide and quicktour scripts. Fixes #14706.
* Add bookmark and launcher for the Quick Tour.

Adjust the AddFileDataAttributeRule to create its temporary file in
the "common" architecture, the file is not architecture specific.

Add a rule PrepareScriptWithIcon in src/data/bin/Jamfile to assign
an icon and make the script executable.

Change-Id: Ia7604ff4715a5aaf9a645c1b3333a954d6a4dafc
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1924
Reviewed-by: Adrien Destugues <[email protected]>

data/bin/userguide

@@ -1,16 +0,0 @@
-#!/bin/bash
-
-userGuideURL="\
-	https://www.haiku-os.org/docs/userguide/en/contents.html"
-userGuideDir=/boot/system/documentation/userguide/
-userGuide=$userGuideDir/en/contents.html
-localizedUserGuide=$userGuideDir/"$LANG"/contents.html
-
-if [ -f $localizedUserGuide ]; then
-	open file://$localizedUserGuide
-elif [ -f $userGuide ]; then
-	open $userGuide
-else
-	open $userGuideURL
-fi
-