Add WinGet installation commands to start-here.md (#5890)

* Add WinGet installation commands to start-here.md

Added installation instructions for WinGet in the documentation when WinGet is not immediately available.

* Apply suggestions from code review

Co-authored-by: Beth Pan <[email protected]>

* Update hub/apps/get-started/start-here.md

* Fix link to 'Using WinGet' in start-here.md

Updated the link for 'Using WinGet' to point to the correct index file.

Author: beth-panx

hub/apps/get-started/start-here.md

@@ -30,6 +30,13 @@ winget configure -f https://aka.ms/winui-config
 
 To review the config file and learn more, see its [README](https://github.com/microsoft/winget-dsc/blob/main/samples/Configuration%20files/Learn%20tutorials/WinUI/README.md) on GitHub.
 
+> [!NOTE]
+> If WinGet is not available by default in your environment, you can use the following commands to install it. See [Using WinGet](../../package-manager/winget/index.md) for more information.
+```powershell
+Install-Module -Name Microsoft.WinGet.Client -Force
+Repair-WinGetPackageManager -AllUsers
+```
+
 #### [Manual installation](#tab/manual)
 
 #### Enable Developer Mode