Shopfloor scripts: em-dash to hyphen, add positional Level param

Replace em-dash characters with plain hyphens across the 5 shopfloor
setup scripts (avoids cp1252 mojibake in .bat files and keeps the
PowerShell sources consistent). Also adds [Parameter(Position=1)] to
Write-PreInstallLog so the Level argument can be passed positionally.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

playbook/shopfloor-setup/Standard/01-eDNC.ps1

@@ -1,11 +1,11 @@
-# 01-eDNC.ps1 — Install eDNC and deploy custom eMxInfo.txt (Standard)
+# 01-eDNC.ps1 - Install eDNC and deploy custom eMxInfo.txt (Standard)
 
 Write-Host "=== eDNC Setup ==="
 
 $edncDir = "C:\Enrollment\shopfloor-setup\Standard\eDNC"
 
 if (-not (Test-Path $edncDir)) {
-    Write-Warning "eDNC folder not found at $edncDir — skipping."
+    Write-Warning "eDNC folder not found at $edncDir - skipping."
     exit 0
 }