feat(properties): conform entity property groups to PROPERTIES.md

Rewrite each entity's property builder to the per-entity group/row spec:
the correct sections (Geometry, Misc, Text, Pattern, Lines & Arrows, Leaders,
Block, …) with the spec's rows and real computed values — Diameter,
Circumference, Area, Delta X/Y/Z, Angle, Total angle, Arc length, Radius ratio,
etc. — plus apply routing for the editable rows.

Covers ~26 entities (Line, Circle, Arc, Point, Ellipse, Spline, polylines,
Ray/XLine, Insert, Text, MText, Hatch, Leader, MultiLeader, Tolerance, Solid,
Solid3D/Region/Body, meshes, MLine, Raster/Wipeout, Underlay, Table, Viewport,
Attribute, OLE). The 3D Visualization/Material group and the full Dimension
spec are deferred (they need document access for material/dimstyle name
resolution). Rows whose data is not in the pinned acadrust revision are shown
as empty placeholders, to be filled when the dependency is bumped.

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

src/entities/point.rs

@@ -182,9 +182,9 @@ fn properties(pt: &Point) -> Vec<PropSection> {
     vec![PropSection {
         title: "Geometry".into(),
         props: vec![
-            edit("X", "loc_x", pt.location.x),
-            edit("Y", "loc_y", pt.location.y),
-            edit("Z", "loc_z", pt.location.z),
+            edit("Position X", "loc_x", pt.location.x),
+            edit("Position Y", "loc_y", pt.location.y),
+            edit("Position Z", "loc_z", pt.location.z),
         ],
     }]
 }