M0: workspace, geometry foundation, sketch constraint solver, kernel boundary

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

crates/kernel/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "solvecraft-kernel"
+description = "SolveCraft B-rep kernel boundary: solids, extrude/revolve/booleans/fillets, tessellation, measures and STEP, behind our own API"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+solvecraft-geom = { workspace = true }
+serde = { workspace = true }
+thiserror = { workspace = true }
+log = { workspace = true }
+monstertruck-modeling = { workspace = true }
+monstertruck-solid = { workspace = true }
+monstertruck-meshing = { workspace = true }
+monstertruck-io = { workspace = true }