M0: truck-based kernel with local fillets and chamfers, parametric document timeline

The kernel moved from monstertruck to truck: truck's booleans handle blind
holes, pockets and bosses that monstertruck's did not (see the ADR). Fillets
and chamfers on straight convex edges between planar faces are our own exact
local B-rep operation. The document holds parameters with unit-aware
expressions and a timeline that re-evaluates incrementally.

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

crates/doc/Cargo.toml

@@ -1,8 +1,18 @@
 [package]
 name = "solvecraft-doc"
+description = "SolveCraft document model: parameters and expressions, sketches and features on a parametric timeline, incremental evaluation"
 version.workspace = true
 edition.workspace = true
 license.workspace = true
 
 [lints]
 workspace = true
+
+[dependencies]
+solvecraft-geom = { workspace = true }
+solvecraft-sketch = { workspace = true }
+solvecraft-kernel = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+thiserror = { workspace = true }
+log = { workspace = true }