Implement Windows support

Author: agriyakhetarpal

action.yml

@@ -197,23 +197,38 @@ runs:
       working-directory: ${{ github.action_path }}
       env:
         REQUESTED_VERSION: ${{ inputs.Version }}
+        PREVIEW: ${{ inputs.Preview }}
         GITHUB_TOKEN: ${{ github.token }}
       run: |
         # Install-PowerShell
         Write-Host "Requested version: [$env:REQUESTED_VERSION]"
+        Write-Host "Preview mode: [$env:PREVIEW]"
 
         # Resolve 'latest' → concrete version
         $req = $env:REQUESTED_VERSION
         if ($req -and $req.Trim().ToLower() -eq 'latest') {
-            $latest = (
-              Invoke-RestMethod -Uri 'https://api.github.com/repos/PowerShell/PowerShell/releases/latest' `
-              -Headers @{
-                'Accept' = 'application/vnd.github+json'
-                'Authorization' = "Bearer $($env:GITHUB_TOKEN)"
-                'X-GitHub-Api-Version' = '2022-11-28'
-              }
-            ).tag_name.TrimStart('v')
-            Write-Host "Latest stable PowerShell release detected: $latest"
+            if ($env:PREVIEW -eq 'true') {
+                Write-Host "Fetching latest preview release..."
+                $releases = Invoke-RestMethod -Uri 'https://api.github.com/repos/PowerShell/PowerShell/releases' `
+                  -Headers @{
+                    'Accept' = 'application/vnd.github+json'
+                    'Authorization' = "Bearer $($env:GITHUB_TOKEN)"
+                    'X-GitHub-Api-Version' = '2022-11-28'
+                  }
+                $latestPreview = $releases | Where-Object { $_.prerelease -eq $true } | Select-Object -First 1
+                $latest = $latestPreview.tag_name.TrimStart('v')
+                Write-Host "Latest preview PowerShell release detected: $latest"
+            } else {
+                $latest = (
+                  Invoke-RestMethod -Uri 'https://api.github.com/repos/PowerShell/PowerShell/releases/latest' `
+                  -Headers @{
+                    'Accept' = 'application/vnd.github+json'
+                    'Authorization' = "Bearer $($env:GITHUB_TOKEN)"
+                    'X-GitHub-Api-Version' = '2022-11-28'
+                  }
+                ).tag_name.TrimStart('v')
+                Write-Host "Latest stable PowerShell release detected: $latest"
+            }
             $env:REQUESTED_VERSION = $latest
         } elseif ([string]::IsNullOrWhiteSpace($req)) {
             Write-Host "Error: Version input is required (or use 'latest')"