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)

devicecamera.asp

@@ -118,8 +118,8 @@
         <div class="col-lg-12">
           <nav aria-label="breadcrumb">
             <ol class="breadcrumb">
-              <li class="breadcrumb-item"><a href="network_devices.asp">Network Devices</a></li>
-              <li class="breadcrumb-item"><a href="network_devices.asp?filter=Camera">Cameras</a></li>
+              <li class="breadcrumb-item"><a href="networkdevices.asp">Network Devices</a></li>
+              <li class="breadcrumb-item"><a href="networkdevices.asp?filter=Camera">Cameras</a></li>
               <li class="breadcrumb-item active"><%If isNewRecord Then Response.Write("Add Camera") Else Response.Write("Edit Camera")%></li>
             </ol>
           </nav>
@@ -136,7 +136,7 @@
               </h5>
               <hr>
 
-              <form method="post" action="save_network_device.asp">
+              <form method="post" action="savenetworkdevice.asp">
                 <input type="hidden" name="type" value="camera">
                 <input type="hidden" name="id" value="<%=cameraid%>">
 
@@ -466,7 +466,7 @@
                       <i class="zmdi zmdi-save"></i>
                       <%If isNewRecord Then Response.Write("Add Camera") Else Response.Write("Save Changes")%>
                     </button>
-                    <a href="network_devices.asp?filter=Camera" class="btn btn-secondary">
+                    <a href="networkdevices.asp?filter=Camera" class="btn btn-secondary">
                       <i class="zmdi zmdi-close"></i> Cancel
                     </a>
                     <%If Not isNewRecord Then%>
@@ -514,7 +514,7 @@ function confirmDelete() {
   if (confirm('Are you sure you want to delete this camera? This action cannot be undone.')) {
     var form = document.createElement('form');
     form.method = 'POST';
-    form.action = 'save_network_device.asp';
+    form.action = 'savenetworkdevice.asp';
 
     var typeInput = document.createElement('input');
     typeInput.type = 'hidden';