[feat] Add a mime type for guiguider and ability to open a file/project from .guiguider file

[FederAndInk]

On Linux you can create a mime type for Gui Guider so that it is possible to open a project through a file manager
For instance here is what I generated:

cat share/mime/packages/application-x-guiguider.xml 
<?xml version="1.0" encoding="UTF-8"?>
<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
<mime-type type="application/x-guiguider">
<icon name="Gui-Guider"/>
<glob-deleteall/>
<glob pattern="*.guiguider"/>
</mime-type>
</mime-info>

 Unfortunately, GUI guider doesn't support opening a .guiguider file through the command line

[Alice_Yang]

Hello @FederAndInk 

Thanks for your suggestion, we will report to development team.

BR

Alice