added property Platform to sitestate to detect maui platform

[pyramidsbuilder]

To detect the platform (ex: Android) in Maui rendering, and be able to do adjustments in Theme/Module:

added property platform to sitestate
pass the platform name from Maui
Use the platform name for adjustments in Theme/Module

[sbwalker]

@pyramidsbuilder I do not understand the benefit of this enhancement. Adding this property to SiteState basically means that a module would need to inject the SiteState service into their component in order to reference the property value - which is more work than simply calling DeviceInfo.Current.Platform.ToString() from the component directly?

[pyramidsbuilder]

@sbwalker "DeviceInfo.Current" .. is a Maui class, I could not access it from Module/theme, I wanted to know the platform on Module/theme level to hide/show , so I came to this solution, it is probably a special case or not very usable, but I thought about sharing it

[sbwalker]

Ok... that makes sense. The SiteState service would be the correct place to store this information - it is intended for information which is provided by the hosting environment for the Blazor application. However, the Routes component (rather than the Head component) is the location where SiteState is initialized. Note that when running on Web there is the opportunity to use this same property to include information about the server environment. PR #3896 adds this functionality.