feat(node-editor, blueprint): add group box and math/logic nodes (#438)

* feat(node-editor, blueprint): add group box and math/logic nodes

node-editor:
- Add visual group box for organizing nodes
- Dynamic bounds calculation based on node pin counts
- Groups auto-resize to wrap contained nodes
- Dragging group header moves all nodes together

blueprint:
- Add comprehensive math nodes (modulo, power, sqrt, trig, etc.)
- Add logic nodes (comparison, boolean, select)

docs:
- Update nodes.md with new math and logic nodes
- Add group feature documentation to editor-guide.md

* chore: remove unused debug and test scripts

Remove FBX animation debug scripts that are no longer needed:
- analyze-fbx, debug-*, test-*, verify-*, check-*, compare-*, trace-*, simple-fbx-test

Remove unused kill-dev-server.js from editor-app

.changeset/group-box-feature.md

@@ -0,0 +1,28 @@
+---
+"@esengine/node-editor": minor
+"@esengine/blueprint": minor
+---
+
+feat(node-editor): add visual group box for organizing nodes
+
+- Add NodeGroup model with dynamic bounds calculation based on node pin counts
+- Add GroupNodeComponent for rendering group boxes behind nodes
+- Groups automatically resize to wrap contained nodes
+- Dragging group header moves all nodes inside together
+- Support group serialization/deserialization
+- Export `estimateNodeHeight` and `NodeBounds` for accurate size calculation
+
+feat(blueprint): add comprehensive math and logic nodes
+
+Math nodes:
+- Modulo, Abs, Min, Max, Power, Sqrt
+- Floor, Ceil, Round, Sign, Negate
+- Sin, Cos, Tan, Asin, Acos, Atan, Atan2
+- DegToRad, RadToDeg, Lerp, InverseLerp
+- Clamp, Wrap, RandomRange, RandomInt
+
+Logic nodes:
+- Equal, NotEqual, GreaterThan, GreaterThanOrEqual
+- LessThan, LessThanOrEqual, InRange
+- AND, OR, NOT, XOR, NAND
+- IsNull, Select (ternary)