Add "Create Shortcut" To app context menu (#4734)

* Added basic implementation for shortcut creation

Currently bitmaps (.bmp) are used as the source file, colours are good (unlike .ico rn) but are scaled poorly on desktop.

* Icons display properly in shortcut

* code cleanup

* Moved shortcut logic to specific file, added Ava UI for shortcuts

* Added linux .desktop shortcut creation

* fixes to .shortcut data

* code issue fixes

* Added basic implementation for shortcut creation

Currently bitmaps (.bmp) are used as the source file, colours are good (unlike .ico rn) but are scaled poorly on desktop.

* Icons display properly in shortcut

* code cleanup

* Moved shortcut logic to specific file, added Ava UI for shortcuts

* Added linux .desktop shortcut creation

* fixes to .shortcut data

* code issue fixes

* added back shortcut to new contextmenu file

* Replaced COM reference with ComImport for shortcut functionality

* remove specific platform values and regions

* Move ShortcutHelper to Ryujinx.Ui.Common.Helpers

* Adjust styling and structure

* code feedback changes

* Added MacOS support using .app folder

* Added basic implementation for shortcut creation

Currently bitmaps (.bmp) are used as the source file, colours are good (unlike .ico rn) but are scaled poorly on desktop.

* Icons display properly in shortcut

* code cleanup

* Moved shortcut logic to specific file, added Ava UI for shortcuts

* Added linux .desktop shortcut creation

* fixes to .shortcut data

* code issue fixes

* Added basic implementation for shortcut creation

Currently bitmaps (.bmp) are used as the source file, colours are good (unlike .ico rn) but are scaled poorly on desktop.

* Icons display properly in shortcut

* code cleanup

* Moved shortcut logic to specific file, added Ava UI for shortcuts

* Added linux .desktop shortcut creation

* fixes to .shortcut data

* code issue fixes

* Replaced COM reference with ComImport for shortcut functionality

* remove specific platform values and regions

* Move ShortcutHelper to Ryujinx.Ui.Common.Helpers

* Adjust styling and structure

* code feedback changes

* adjust tooltip message

* added shortcut-template.desktop file

* set shortcut icon location to .local/share/icons

* Linux code feedback changes

* change InteropServices to new securifybv.ShellLink Package

* added ShellLink to readme, updated shortcut comment

* Code feedback changes

* Added MacOS Support (As per Jose Estrada's PR)

* dotnet format

* Small restructuring

* Embed template files into Ryujinx.Ui.Common

* Disable "CreateShortcut" option for flatpak builds

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Co-authored-by: TSR Berry <20988865+TSRBerry@users.noreply.github.com>
Co-authored-by: Jose Estrada <joseestradacobo@gmail.com>