TCT NetProbe - standalone network scanner (The Computer Touch)

1) Keep TCT-NetProbe.ps1 and netprobe-local.html in the same folder.
2) (Optional) drop iperf3.exe in the same folder for link tests.
3) Run in PowerShell on a PC on the client network:
     .\TCT-NetProbe.ps1 -Serve -Targets 192.168.1.1,192.168.1.13,192.168.1.55
   or with a scope file (one IP per line):
     .\TCT-NetProbe.ps1 -Serve -ScopeFile .\scope.txt
4) It opens http://localhost:8099 with the dashboard. Run as Administrator if the port is refused.

Scope is point-to-point + edge devices only - it never touches anything else on the network.
