Migrate input docs from UWP to WinUI 3#5913

stevewhims merged 3 commits intoMicrosoftDocs:docsMicrosoftDocs/windows-dev-docs:docsfrom

qiutongMS:fix/input-winui3-migrationqiutongMS/windows-dev-docs:fix/input-winui3-migrationCopy head branch name to clipboard