Initial workspace: scaffold + constitution + spec documents

Rust workspace with 5 crates (mesh-types, mesh-crypto, mesh-network,
mesh-validator, mesh-wallet), PROJECT_CONSTITUTION.md for CHORUS
automated ingestion, and the full MESH protocol specification suite.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,14 @@
+[workspace]
+resolver = "2"
+members = [
+    "crates/mesh-types",
+    "crates/mesh-crypto",
+    "crates/mesh-network",
+    "crates/mesh-validator",
+    "crates/mesh-wallet",
+]
+
+[workspace.package]
+version = "0.1.0"
+edition = "2024"
+license = "Apache-2.0"