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

Co-Authored-By: Claude Opus 5.5 <[email protected]>

xtask/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "xtask"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+publish = false
+
+[dependencies]
+serde_json = { workspace = true }

xtask/src/main.rs

@@ -0,0 +1 @@
+fn main() {}