Provide Framework MSIX package for Qt6 binaries in Microsoft Store

What is MSIX?
MSIX is a Windows app package format that provides a modern packaging experience to all Windows apps.  

AppxManifest.xml
The package manifest is an XML document that contains the info the system needs to deploy, display, or update a Windows app. 

Dependencies
It is possible to declare a dependency on another package that is marked as a Frameworkpackage.

Frameworks

frameworks  are packages, that can be used by other packages.

The idea is to provide Qt runtime binaries as a Framework package, to make possible developers just point dependencies in AppxManifes.xml file instead of shipping a several dozen MB duplicate binaries whit each application.  

for example:

<Dependencies>
  <PackageDependency Name="org.qtproject.qtbase" Publisher="CN=The Qt Company ....."  MinVersion="5.15.0" MaxMajorVersionTested="5"/> 
</Dependencies>

just like the binaries are shipped on Debian/Ubuntu systems and developers can specify dependencies of their DEB packages in DEBIAN/control file

Package: some-package
Version: 1.2.3
Maintainer: Delphi251189 <delphi251189@gmail.com>
Depends: libqt5core5a,libqt5gui5,libqt5widgets5,.........
Architecture: x86_64
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