Add PowerShell dependency to winget manifests

Modify the winget workflow to inject a PowerShell >= 7.0.0 dependency
into the installer manifest before submission. This ensures users have
PowerShell 7+ installed when installing via winget.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SteveSandersonMS

.github/workflows/winget.yml

@@ -41,4 +41,20 @@ jobs:
           .\wingetcreate.exe update $packageId `
             --version $packageVersion `
             --urls "$installerUrlx64|x64" "$installerUrlarm64|arm64" `
-            --submit
+            --out manifests
+          
+          # Add PowerShell dependency to installer manifest
+          $installerManifest = Get-ChildItem -Path manifests -Filter "*.installer.yaml" -Recurse | Select-Object -First 1
+          $content = Get-Content $installerManifest -Raw
+          $dependency = @"
+Dependencies:
+  PackageDependencies:
+    - PackageIdentifier: Microsoft.PowerShell
+      MinimumVersion: "7.0.0"
+"@
+          # Insert dependency block before the Installers section
+          $content = $content -replace '(?m)^Installers:', "$dependency`nInstallers:"
+          Set-Content -Path $installerManifest -Value $content -NoNewline
+          
+          # Submit the modified manifest
+          .\wingetcreate.exe submit manifests