fix: address copilot feedback (encoding detection and variable naming)

Author: Nimraakram12

scripts/powershell/create-new-feature.ps1

@@ -351,9 +351,9 @@ if (-not $DryRun) {
         $template = Resolve-Template -TemplateName 'spec-template' -RepoRoot $repoRoot
         if ($template -and (Test-Path $template)) {
             # Read the template content and write it to the spec file with UTF-8 encoding without BOM
-            $content = Get-Content -Raw -Encoding UTF8 -Path $template
+            $content = [System.IO.File]::ReadAllText($template)
             $utf8NoBom = New-Object System.Text.UTF8Encoding($false)
-            [System.IO.File]::WriteAllText($targetPath, $content, $utf8NoBom)
+            [System.IO.File]::WriteAllText($specFile, $content, $utf8NoBom)
         } else {
             New-Item -ItemType File -Path $specFile -Force | Out-Null
         }

scripts/powershell/setup-plan.ps1

@@ -36,10 +36,10 @@ $template = Resolve-Template -TemplateName 'plan-template' -RepoRoot $paths.REPO
 if ($template -and (Test-Path $template)) { 
     # Read the template content and write it to the implementation plan file with UTF-8 encoding without BOM
    # Read the template content as UTF-8 and write it to the implementation plan file with UTF-8 encoding without BOM
-    $content = Get-Content -Raw -Encoding UTF8 -Path $template
+    # Read the template content and write it to the implementation plan file with UTF-8 encoding without BOM
+    $content = [System.IO.File]::ReadAllText($template)
     $utf8NoBom = New-Object System.Text.UTF8Encoding($false)
     [System.IO.File]::WriteAllText($paths.IMPL_PLAN, $content, $utf8NoBom)
-    Write-Output "Copied plan template to $($paths.IMPL_PLAN)"
 } else {
     Write-Warning "Plan template not found"
     # Create a basic plan file if template doesn't exist