ci: locate swift.exe after winget install in Windows spike

Author: yashranaway

.github/workflows/windows-spike.yml

@@ -23,10 +23,22 @@ jobs:
         run: |
           winget install --id Swift.Toolchain -e --source winget `
             --accept-source-agreements --accept-package-agreements
-          $swiftBin = Join-Path $env:LOCALAPPDATA 'Programs\Swift\bin'
-          if (-not (Test-Path $swiftBin)) {
-            $swiftBin = 'C:\Swift\bin'
+          $candidates = @(
+            (Join-Path $env:LOCALAPPDATA 'Programs\Swift\bin'),
+            'C:\Swift\bin',
+            (Join-Path $env:LOCALAPPDATA 'Microsoft\WinGet\Packages')
+          )
+          $swiftBin = $null
+          foreach ($c in $candidates) {
+            if (Test-Path (Join-Path $c 'swift.exe')) { $swiftBin = $c; break }
           }
+          if (-not $swiftBin) {
+            $found = Get-ChildItem $env:LOCALAPPDATA,'C:\' -Recurse -Filter 'swift.exe' `
+              -ErrorAction SilentlyContinue -Depth 5 | Select-Object -First 1
+            if ($found) { $swiftBin = $found.DirectoryName }
+          }
+          if (-not $swiftBin) { throw 'swift.exe not found after winget install' }
+          Write-Host "Found swift at: $swiftBin"
           Add-Content $env:GITHUB_PATH $swiftBin
 
       - name: Set up MSVC environment