feat: init

templates/default/README.md

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+# rust workspace template
+
+This is an experiment to contain the code for all components in a single repository, also known as a monorepository.
+
+## Repository Layout
+
+The code is grouped by language or framework name.
+
+### Nix
+
+```
+/flake.nix
+/flake.lock
+/nix/ /* [blueprint](https://github.com/numtide/blueprint)  set up underneath here. */
+```
+
+### Rust
+
+```
+/Cargo.toml
+/Cargo.lock
+/rust/ # all rust code lives here
+/rust/common/Cargo.toml
+/rust/common/src/lib.rs
+```