Add sample for title bar customization

[MartinZikmund]

What would you like to be added:

Uno Gallery sample on using ApplicationViewTitleBar API . See https://platform.uno/docs/articles/features/windows-ui-viewmanagement.html

Why is this needed:

Developer samples

For which Platform:

All

[donheshanthaka]

Hey there, can you assign me for this issue, also do we need to provide a sample for windows only or in other platforms as well?

[MartinZikmund]

Hi, assigned 👍 . This is supported on Windows and on WASM (when the app is installed as PWA on desktop or in some mobile browsers like Chrome)

[donheshanthaka]

Thank you for the information

[AryanParashar24]

Hey @MartinZikmund i would really love to work on this issue😄😄😄😄😄, could u plz assign this to me

[MartinZikmund]

@AryanParashar24 please start by contributing one of the already assigned issues first, so that there is less assigned in parallel 😊. Once you have a PR open, I will assign more 👍

[Harshal0902]

Hi @MartinZikmund can I work on this issue?