fix: use Console::Error.WriteLine instead of Write-Error in setup-tasks.ps1

Author: Nimraakram12

scripts/powershell/setup-tasks.ps1

@@ -49,7 +49,7 @@ if (Test-Path $paths.QUICKSTART) { $docs += 'quickstart.md' }
 $tasksTemplate = Resolve-Template -TemplateName 'tasks-template' -RepoRoot $paths.REPO_ROOT
 if (-not $tasksTemplate) {
     $expectedCoreTemplate = Join-Path $paths.REPO_ROOT '.specify/templates/tasks-template.md'
-    Write-Error "Tasks template not found for repository root: $($paths.REPO_ROOT)`nExpected shared/core template location: $expectedCoreTemplate`nTo continue, restore the shared templates (for example by re-running 'specify init') so that '.specify/templates/tasks-template.md' exists, or add a valid tasks-template override."
+    [Console]::Error.WriteLine("Tasks template not found for repository root: $($paths.REPO_ROOT)`nExpected shared/core template location: $expectedCoreTemplate`nTo continue, restore the shared templates (for example by re-running 'specify init') so that '.specify/templates/tasks-template.md' exists, or add a valid tasks-template override.")
     exit 1
 }