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)

displayapplication.asp

@@ -260,7 +260,7 @@
 
                 <div class="tab-pane" id="edit">
                     <h5 class="mb-3">Edit Application</h5>
-                    <form method="post" action="./editapplication_direct.asp">
+                    <form method="post" action="./editapplicationdirect.asp">
                         <input type="hidden" name="appid" value="<%=Server.HTMLEncode(rs("appid"))%>">
 
                         <div class="form-group">