package engine redesign

- WingetUI has been rebranded to UniGetUI with a new icon - The Package Engine has been redesigned - Package managers that support fetching packages via APIs have seen speed improvements - Icons are now provided directly to packages by supporting package managers - Microsoft Store packages now show screenshots on the details page - System WinGet is now used by default instead of bundled WinGet - WinGet Packages will no longer show as ellipted - Lifecycle of Packages, PackageDetails, and InstallationOptions have been modified to avoid duplicated instances of data in RAM - Widgets for UniGetUI now load packages faster - Users will be prompted to install missing dependencies for package managers - Software Pages have been rebuilt with ItemsView instead of ListView to decrease RAM usage - Package Details page has been rebuilt with RichTextBlock for better presentation - Logs pages have been rebuilt to provide more important information - Settings page has been reorganized into more coherent categories - ContentDialogs have been improved with a "Close" button for dialogs that do not require user input - The Package Engine has been decoupled from the Interface - System Tray has new pixel-perfect icons - Installer ensures WinGet and Microsoft.WinGet.Client are present on the system - Installer allows the user to not install Chocolatey - Various bug fixes and improvements have been made