Point clouds: drawn from their scans, placed, cropped and attached as the reference does

Scans (.rcs) and projects (.rcp) are read and their points drawn as
screen-sized dots, coloured by the cloud's stylization. The cloud's
placement carries its scale and rotation; its extents and crops stay in
the scan's coordinates. A missing scan shows the extents with the saved
path. -POINTCLOUDATTACH / POINTCLOUDATTACH, POINTCLOUDCROP and the
POINTCLOUD* settings follow the reference's prompts and messages, the
Properties list is the reference's, and a locked cloud is left alone by
edits.

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

src/app/commands/mod.rs

@@ -14,6 +14,7 @@ mod inquiry;
 mod layerprops;
 mod layers;
 pub(crate) mod pdf_import;
+mod point_cloud;
 mod pdf_underlay;
 mod pdf_dialogs;
 mod xclip;
@@ -636,6 +637,21 @@ inventory::submit!(crate::command::CommandRegistration {
         "PDFIMPORTIMAGEPATH",
         "XDWGFADECTL",
         "POINTCLOUDCLIPFRAME",
+        "POINTCLOUDDENSITY",
+        "POINTCLOUDPOINTSIZE",
+        "POINTCLOUDLOCK",
+        "POINTCLOUDAUTOUPDATE",
+        "POINTCLOUDBOUNDARY",
+        "POINTCLOUDRTDENSITY",
+        "POINTCLOUDLOD",
+        "POINTCLOUDPOINTMAX",
+        "POINTCLOUDVISRETAIN",
+        "POINTCLOUDSHADING",
+        "POINTCLOUDCACHESIZE",
+        "POINTCLOUD2DVSDISPLAY",
+        "POINTCLOUDLIGHTING",
+        "POINTCLOUDLIGHTSOURCE",
+        "POINTCLOUDPOINTMAXLEGACY",
         "XCLIPFRAME",
         "WIPEOUTFRAME",
         "FRAMES0",