feat(toolkit): add bulk delete tool, fix TUI exit hang and tenant re-prompt

- New Scripts/Bulk-DeletePolicies.ps1: type-DELETE confirmation, -WhatIf dry-run
- Fix infinite loop in Start-IntuneToolkit.ps1 when fzf missing (numbered-menu
  Exit returned "EXIT" but check only matched fzf's "[Exit]" string)
- Start-IntuneManagementTui.ps1 no longer re-prompts for TenantId when the
  launcher already resolved one; also fixes misleading "regex" wording on
  the Name filter prompt (it's a literal substring match)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Scripts/Start-HeadlessIntune.ps1

@@ -84,7 +84,7 @@ if($Interactive)
     $tuiScript = Join-Path (Split-Path -Parent $PSScriptRoot) "Scripts/Private/Start-IntuneManagementTui.ps1"
     if(Test-Path $tuiScript)
     {
-        $tuiResult = & $tuiScript
+        $tuiResult = & $tuiScript -TenantId $TenantId
         if(-not $tuiResult) { Write-Host "No selection made. Exiting." -ForegroundColor Yellow; exit 0 }
         foreach($prop in $tuiResult.PSObject.Properties)
         {