feat: node graph overlay; move to opencadcodec/opencadkernel/opencadgraph

The codec and kernel repositories and crates are renamed opencadcodec and
opencadkernel. Inside OCS they are depended on under short keys, so code
reads `codec::`, `kernel::` and the new `graph::` (opencadgraph, the node
graph engine). File-format and protocol spellings stay as they were: the
ACIS product id `acadrust`, the ACADRUST_* switches and the plugin
version keys `acadrust_version` / `acadrust_source`.

A button left of MCP on the command line opens a translucent node graph
over the viewport, with a palette of object, input, math, logic, list,
text and geometry nodes added by click or drag. An object node owns
drawing entities and its rows are the Properties panel's own rows for
them: the single-object page is extracted from refresh_properties as
entity_property_sections, values use the control protocol's
property_json, and writes go through set_property_value with a property
target override, so the panel, MCP and the graph share one read/write
path. A list reaching an object row makes one entity per element. Each
graph action is one undo step; the canvas pans and zooms.

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

src/scene/model/sweep_command_model.rs

@@ -1,17 +1,17 @@
 //! SWEEP command data mapped to the shared kernel history reconstruction.
 
-use acadrust::entities::{Surface, SurfaceData, SurfaceKind, SurfaceSweepOptions};
-use acadrust::objects::{SolidHistoryNodeBase, SolidHistorySweep};
-use acadrust::types::Vector3;
-use acadrust::EntityType;
-use cadkernel::brep::Body;
+use codec::entities::{Surface, SurfaceData, SurfaceKind, SurfaceSweepOptions};
+use codec::objects::{SolidHistoryNodeBase, SolidHistorySweep};
+use codec::types::Vector3;
+use codec::EntityType;
+use kernel::brep::Body;
 
 use crate::command::{ExtrudeMode, SweepOptions};
 use super::sweep_model::{embedded_path, embedded_revolve_profile};
 
-fn embedded_sweep_profile(entity: &EntityType) -> Option<(acadrust::entities::EmbeddedEntity, [f64; 16])> {
+fn embedded_sweep_profile(entity: &EntityType) -> Option<(codec::entities::EmbeddedEntity, [f64; 16])> {
     if let EntityType::Region(region) = entity {
-        Some((acadrust::entities::EmbeddedEntity::Region(region.clone()), glam::DMat4::IDENTITY.to_cols_array()))
+        Some((codec::entities::EmbeddedEntity::Region(region.clone()), glam::DMat4::IDENTITY.to_cols_array()))
     } else {
         embedded_revolve_profile(entity)
     }
@@ -19,13 +19,13 @@ fn embedded_sweep_profile(entity: &EntityType) -> Option<(acadrust::entities::Em
 
 pub fn is_sweep_profile(entity: &EntityType) -> bool {
     embedded_sweep_profile(entity).is_some_and(|(profile, transform)| {
-        cadkernel::acis::sweep_profile_geometry(&profile, transform).is_ok()
+        kernel::acis::sweep_profile_geometry(&profile, transform).is_ok()
     })
 }
 
 pub fn is_sweep_path(entity: &EntityType) -> bool {
     match embedded_path(entity) {
-        Some(acadrust::entities::EmbeddedEntity::Spline(value)) => {
+        Some(codec::entities::EmbeddedEntity::Spline(value)) => {
             value.degree > 0 && (value.control_points.len() > value.degree as usize
                 || value.fit_points.len() >= 2)
         }
@@ -42,21 +42,21 @@ pub fn sweep_selection_options(profiles: &[EntityType], mut options: SweepOption
     }
     let geometry = profiles.iter().map(|profile| {
         let (entity, transform) = embedded_sweep_profile(profile)?;
-        let (plane, wires, _) = cadkernel::acis::sweep_profile_geometry(&entity, transform).ok()?;
+        let (plane, wires, _) = kernel::acis::sweep_profile_geometry(&entity, transform).ok()?;
         Some((plane, wires))
     }).collect::<Option<Vec<_>>>()?;
     options.base_point = Some(glam::DVec3::from_array(
-        cadkernel::brep::sweep_profile_group_base(&geometry)?,
+        kernel::brep::sweep_profile_group_base(&geometry)?,
     ));
     Some(options)
 }
 
 pub fn sweep_record(profile: &EntityType, path: &EntityType, options: SweepOptions) -> Option<SolidHistorySweep> {
     let (sweep_entity, sweep_entity_transform) = embedded_sweep_profile(profile)?;
-    let (plane, wires, _) = cadkernel::acis::sweep_profile_geometry(&sweep_entity, sweep_entity_transform).ok()?;
+    let (plane, wires, _) = kernel::acis::sweep_profile_geometry(&sweep_entity, sweep_entity_transform).ok()?;
     let base_point = match options.base_point {
         Some(point) => point.to_array(),
-        None => cadkernel::brep::sweep_profile_base(plane, &wires)?,
+        None => kernel::brep::sweep_profile_base(plane, &wires)?,
     };
     let mut base = SolidHistoryNodeBase::new(1);
     base.transform = glam::DMat4::IDENTITY.to_cols_array();
@@ -79,13 +79,13 @@ pub fn sweep_record(profile: &EntityType, path: &EntityType, options: SweepOptio
 
 pub fn swept_with_options(profile: &EntityType, path: &EntityType, mode: ExtrudeMode, options: SweepOptions) -> Option<Body> {
     let record = sweep_record(profile, path, options)?;
-    cadkernel::acis::rebuild_sweep_with_mode(&record, mode == ExtrudeMode::Surface).ok()
+    kernel::acis::rebuild_sweep_with_mode(&record, mode == ExtrudeMode::Surface).ok()
 }
 
 /// Preserve native construction parameters alongside the sheet's saved B-rep.
 pub fn swept_surface_entity(record: &SolidHistorySweep) -> EntityType {
     let mut surface = Surface::new(SurfaceKind::Swept);
-    if let Ok(point) = cadkernel::acis::sweep_history_reference_point(record) {
+    if let Ok(point) = kernel::acis::sweep_history_reference_point(record) {
         surface.point_of_reference = Vector3::new(point[0], point[1], point[2]);
     }
     surface.surface_data = SurfaceData::Swept {