ATTACH: FILEDIA, -ATTACH command line and reference file types

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/commands/mod.rs

@@ -712,6 +712,7 @@ inventory::submit!(crate::command::CommandRegistration {
         "PDFOSNAP",
         "UOSNAP",
         "FIELDDISPLAY",
+        "FILEDIA",
         "SURFACEASSOCIATIVITY",
         "LAYOUTCREATEVIEWPORT",
         "FIELDEVAL",
@@ -944,6 +945,7 @@ inventory::submit!(crate::command::CommandRegistration {
         "XR",
         "XREF",
         "-XREF",
+        "-ATTACH",
         "XRELOAD",
         "ZOOM",
         "ZS",