Add maintenance toolkit, DNC/OnGuard utilities

- Add Invoke-RemoteMaintenance.ps1: Remote maintenance tasks (DISM, SFC, disk cleanup, etc.)
- Add DNC/, dncfix/, edncfix/: DNC configuration utilities
- Add onguard/: OnGuard integration scripts
- Add tools/: Additional utility scripts
- Update remote-execution/README.md with maintenance toolkit docs

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tools/Enable-WinRM.bat

@@ -0,0 +1,40 @@
+@echo off
+:: Enable WinRM for Remote Management
+:: Run as Administrator
+
+echo ============================================
+echo   Enable WinRM for ShopDB Remote Management
+echo ============================================
+echo.
+
+:: Check for admin rights
+net session >nul 2>&1
+if %errorLevel% neq 0 (
+    echo ERROR: Please run as Administrator!
+    echo Right-click and select "Run as administrator"
+    pause
+    exit /b 1
+)
+
+echo Enabling WinRM...
+powershell -Command "Enable-PSRemoting -Force -SkipNetworkProfileCheck" 2>nul
+
+echo.
+echo Setting firewall rules...
+powershell -Command "Set-NetFirewallRule -Name 'WINRM-HTTP-In-TCP' -Enabled True -Profile Any" 2>nul
+netsh advfirewall firewall add rule name="WinRM-HTTP" dir=in localport=5985 protocol=TCP action=allow >nul 2>&1
+
+echo.
+echo Starting WinRM service...
+sc config winrm start= auto >nul
+net start winrm >nul 2>&1
+
+echo.
+echo ============================================
+echo   WinRM Enabled Successfully!
+echo   This PC can now be remotely managed.
+echo ============================================
+echo.
+echo Hostname: %COMPUTERNAME%
+echo.
+pause