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)

tonerreport.asp

@@ -903,7 +903,7 @@
 
               // Call clear cache endpoint
               $.ajax({
-                  url: './admin_clear_cache.asp?confirm=yes&type=zabbix&ajax=1',
+                  url: './adminclearcache.asp?confirm=yes&type=zabbix&ajax=1',
                   method: 'GET',
                   success: function() {
                       // Reload page after cache cleared