Standardize ASP filenames: remove underscores

Renamed 45 ASP files to follow lowercase concatenated naming convention:
- Direct handlers: save_machine_direct.asp -> savemachinedirect.asp
- USB files: checkin_usb.asp -> checkinusb.asp
- API files: api_usb.asp -> apiusb.asp
- Map files: network_map.asp -> networkmap.asp
- Printer files: printer_lookup.asp -> printerlookup.asp

Also:
- Updated 84+ internal references across all ASP and JS files
- Deleted 6 test/duplicate files (editmacine.asp, test_*.asp)
- Updated production migration guide with filename changes
- Added rename scripts for Linux (bash) and Windows (PowerShell)

adddevice.asp

@@ -57,7 +57,7 @@ Else
 End If
 %>
 
-                <form id="scanForm" method="post" action="./savedevice_direct.asp">
+                <form id="scanForm" method="post" action="./savedevicedirect.asp">
                   <div class="form-group">
                     <label for="serialnumber">Serial Number</label>
                     <input