feat(commands): expand standard CAD command coverage

Integrate a large batch of standard CAD commands and fix several
name/behaviour mismatches, with no product references in code.

3D solids (reusing the truck B-rep pipeline):
- SLICE, INTERFERE, PRESSPULL, POLYSOLID, PYRAMID, SECTION
- 3DROTATE, 3DMIRROR, 3DALIGN (cached-solid transforms)

Annotation / text:
- ARCTEXT, SPLINEFIT (Catmull-Rom to Bezier), DIMJOGGED, OBJECTSCALE
  (XData markers honoured by the existing geometry-gen / tessellator)

Blocks / misc:
- NCOPY (block-content extraction via explode_entity)
- OPTIONS, SYNCPVIEWPORTS, THICKEN, plus earlier toggles, aliases,
  system variables, and layer/style/view commands

POINTCLOUD/RECAP and UNDERLAYLAYERS/UOSNAP are intentionally left out:
they require a proprietary binary / PDF-layer parser, a GPU point
renderer, and real test files.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/modules/view/ortho.rs

@@ -1,3 +1,7 @@
+// Orthographic-projection toggle (Projection ribbon group).
+// id "ORTHO" keys the active-state highlight (is_active_tool) off the ribbon's
+// projection state; the event uses the PARALLEL verb so the typed ORTHO command
+// stays free for the orthogonal cursor-constraint drafting aid.
 use crate::modules::{IconKind, ModuleEvent, ToolDef};
 pub const ICON: IconKind = IconKind::Svg(include_bytes!("../../../assets/icons/ortho.svg"));
 pub fn tool() -> ToolDef {
@@ -5,6 +9,6 @@ pub fn tool() -> ToolDef {
         id: "ORTHO",
         label: "Ortho",
         icon: ICON,
-        event: ModuleEvent::Command("ORTHO".into()),
+        event: ModuleEvent::Command("PARALLEL".into()),
     }
 }