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)

addapplication.asp

@@ -60,7 +60,7 @@ If errorType <> "" Then
 End If
 %>
 
-              <form method="post" action="./saveapplication_direct.asp">
+              <form method="post" action="./saveapplicationdirect.asp">
 
                   <div class="form-group">
                       <label for="appname">Application Name <span class="text-danger">*</span></label>