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 <[email protected]>

src/entities/insert.rs

@@ -1,6 +1,6 @@
-use acadrust::entities::Insert;
-use acadrust::types::{Matrix3, Transform, Vector3};
-use acadrust::{CadDocument, EntityType, Handle};
+use codec::entities::Insert;
+use codec::types::{Matrix3, Transform, Vector3};
+use codec::{CadDocument, EntityType, Handle};
 use glam::Vec3;
 
 use crate::command::EntityTransform;
@@ -23,7 +23,7 @@ const ATTRIBUTE_GRIP_BASE: usize = 1;
 /// attribute belongs to the block definition rather than this insert, and a
 /// locked position cannot be dragged. Visibility is a separate question: an
 /// invisible attribute that ATTMODE 2 displays is grippable while it shows.
-fn attribute_is_movable(att: &acadrust::entities::AttributeEntity) -> bool {
+fn attribute_is_movable(att: &codec::entities::AttributeEntity) -> bool {
     !att.flags.constant && !att.lock_position && !att.flags.locked_position
 }
 
@@ -58,7 +58,7 @@ pub(crate) fn unscale_attribute_grip(
 fn attribute_is_render_visible(
     document: &CadDocument,
     visibility: i16,
-    attribute: &acadrust::entities::AttributeEntity,
+    attribute: &codec::entities::AttributeEntity,
 ) -> bool {
     let layer_visible = document
         .layers
@@ -89,7 +89,7 @@ fn insert_attribute_block_scale(
 
 fn scale_attribute_for_insert(
     insert: &Insert,
-    attribute: &mut acadrust::entities::AttributeEntity,
+    attribute: &mut codec::entities::AttributeEntity,
     block_scale: f64,
 ) {
     if (block_scale - 1.0).abs() <= 1.0e-6 {
@@ -241,7 +241,7 @@ fn apply_geom_prop(ins: &mut Insert, field: &str, value: &str) {
             }
             let delta = ocs * ins.insert_point - old_world;
             for att in &mut ins.attributes {
-                acadrust::Entity::translate(att, delta);
+                codec::Entity::translate(att, delta);
             }
         }
         // Single Scale row shown while "Uniform scale" is checked (#427).
@@ -281,7 +281,7 @@ fn apply_grip(ins: &mut Insert, grip_id: usize, apply: GripApply) {
     // world delta — otherwise a grip-drag leaves the attribute text behind (#255).
     let delta = world - old_world;
     for att in &mut ins.attributes {
-        acadrust::Entity::translate(att, delta);
+        codec::Entity::translate(att, delta);
     }
 }
 
@@ -296,7 +296,7 @@ fn apply_transform(ins: &mut Insert, t: &EntityTransform) {
 
         let ux = dx / len;
         let uy = dy / len;
-        let mirror = acadrust::types::Matrix4 {
+        let mirror = codec::types::Matrix4 {
             m: [
                 [2.0 * ux * ux - 1.0, 2.0 * ux * uy, 0.0, 0.0],
                 [2.0 * ux * uy, 2.0 * uy * uy - 1.0, 0.0, 0.0],
@@ -311,7 +311,7 @@ fn apply_transform(ins: &mut Insert, t: &EntityTransform) {
                 p1.y as f64,
                 0.0,
             )));
-        acadrust::Entity::apply_transform(entity, &t);
+        codec::Entity::apply_transform(entity, &t);
     });
 }
 
@@ -343,8 +343,8 @@ impl crate::entities::traits::FallbackTess for Insert {
     }
 }
 pub(crate) fn insert_attribute_entities(
-    document: &acadrust::CadDocument,
-    insert: &acadrust::entities::Insert,
+    document: &codec::CadDocument,
+    insert: &codec::entities::Insert,
     annotation_scale: f32,
     scale_policy: crate::scene::BlockScalePolicy,
 ) -> Vec<EntityType> {
@@ -367,8 +367,8 @@ pub(crate) fn insert_attribute_entities(
 
 pub(crate) fn append_insert_attribute_wires(
     wires: &mut Vec<WireModel>,
-    document: &acadrust::CadDocument,
-    ins: &acadrust::entities::Insert,
+    document: &codec::CadDocument,
+    ins: &codec::entities::Insert,
     insert_handle: Handle,
     sel: bool,
     ins_color: [f32; 4],
@@ -458,9 +458,9 @@ pub(crate) fn append_insert_attribute_wires(
 #[cfg(test)]
 mod tests {
     use super::*;
-    use acadrust::entities::AttributeEntity;
-    use acadrust::tables::Layer;
-    use acadrust::xdata::ExtendedDataRecord;
+    use codec::entities::AttributeEntity;
+    use codec::tables::Layer;
+    use codec::xdata::ExtendedDataRecord;
 
     fn attribute(tag: &str, x: f64, y: f64) -> AttributeEntity {
         let mut att = AttributeEntity::new(tag.to_string(), format!("{tag}-value"));