Only check dev mode reg key (#306)

## Description

Fixes #303 

## Type of Change

<!-- Keep the applicable line(s), delete the rest -->

- 🐛 Bug fix

## Checklist
<!-- Delete the ones that do not apply to your changes -->

- [x] Tested locally on Windows

## AI Description

<!-- ai-description-start -->
The DevModeService has been updated to only check for the
"AllowDevelopmentWithoutDevLicense" registry key, removing the previous
dependency on the "AllowAllTrustedApps" key. This change simplifies the
logic for determining if development mode is enabled.
<!-- ai-description-end -->

Co-authored-by: Nikola Metulev <711864+nmetulev@users.noreply.github.com>
Co-authored-by: Alexandre Zollinger Chohfi <alzollin@microsoft.com>

Author: nmetulev

src/winapp-CLI/WinApp.Cli/Services/DevModeService.cs

@@ -71,9 +71,7 @@ public bool IsEnabled()
             return false;
         }
 
-        var dev = (int?)key.GetValue("AllowDevelopmentWithoutDevLicense") == 1;
-        var sideload = (int?)key.GetValue("AllowAllTrustedApps") == 1;
-        return dev && sideload;
+        return (int?)key.GetValue("AllowDevelopmentWithoutDevLicense") == 1;
     }
 
     private static int RunElevated(string fileName, string arguments)