installer: add wizard page to install for all users on windows

this adds a custom installer page with a checkbox to allow users to choose to install the app for all users, when its enabled installer will create a group called 'OpenVPN Administrator'

local users except the admin, guest and default account are added to the group, and upon uninstall the group is removed

this allows non-admin users that are added to the group to use the app and successfully start a vpn connection

fixes #779 (closed)

fixes #857 (closed)

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changed the description

added 5 commits

• 8ce09c74...3b8f0604 - 3 commits from branch leap:main
• b5f0458e - installer: add wizard page to install for all users on windows
• c521a3e1 - installer: use $APPNAME in error messages instead of RiseupVPN

Compare with previous version

added 4 commits

• c521a3e1...12a4c94f - 2 commits from branch leap:main
• ebe02016 - installer: add wizard page to install for all users on windows
• 0236703b - installer: use $APPNAME in error messages instead of RiseupVPN

Compare with previous version

enabled an automatic merge when the pipeline for 0236703b succeeds

merged