Scaffold inicial: workspace Rust + SDDs completos

Arranque del proyecto hammer (distro AI-nativa: laboratorio funcional en el
sótano, terminal mutable clásica arriba, integración de IA programadora).

- Workspace Rust (compila, tests verdes): hammer-core, hammer-build,
  hammer-cli (bin `hammer`), hammerd.
- SDDs 00-10 + 6 ADRs en docs/ con toda la arquitectura.
- Esqueletos navegables mapeados a las fases del roadmap; Fase 0/1 listas
  para implementar el sandbox real.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,38 @@
+[workspace]
+resolver = "2"
+members = [
+    "crates/hammer-core",
+    "crates/hammer-build",
+    "crates/hammer-cli",
+    "crates/hammerd",
+]
+
+[workspace.package]
+version = "0.0.1"
+edition = "2021"
+license = "MIT"
+authors = ["sergio <gerencia@jlsoltech.com>"]
+repository = "https://gitea.gioser.net/sergio/hammer"
+
+[workspace.dependencies]
+hammer-core = { path = "crates/hammer-core" }
+hammer-build = { path = "crates/hammer-build" }
+
+# shared third-party deps, pinned at the workspace level
+anyhow = "1"
+thiserror = "2"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+serde_yaml = "0.9"
+blake3 = "1"
+clap = { version = "4", features = ["derive"] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+
+[profile.release]
+# small, static-friendly binaries for the userland
+opt-level = "z"
+lto = true
+codegen-units = 1
+strip = true
+panic = "abort"