chore(faces): eject rattlescript subtree to its own top-level repo

The affinescript repo holds the canonical compiler, type checker, borrow
checker, codegen, and the face transformer (lib/python_face.ml for the
rattle face). Brand-surface material — README, examples, distribution
shims, tutorials — belongs in dedicated brand repos, not vendored
inside affinescript.

The faces/rattlescript/ subtree had grown into a 6.8 MB shell with:
  - a complete vendored snapshot of the affinescript repo
  - a Cargo.toml + src/main.rs producing a separate `rattle` Rust binary
  - duplicated CONTRIBUTING / SECURITY / CODE_OF_CONDUCT / LICENSE files

That shape is incompatible with the architecture: every face is .affine
through the affinescript toolchain, not a separate compiler. Eject the
subtree; brand-surface content moves to ~/dev/rattlescript/ (and a
hyperpolymath/rattlescript GitHub repo, pending).

Sibling brand-surface repos created in the same pass for the other four
established faces: jaffascript, lucidscript, cafescripto, pseudoscript.
Each carries: README.adoc, LICENSE, bin/<name> shim that injects
--face <face> after the subcommand, justfile, examples/hello.affine,
CONTRIBUTING.md.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hyperpolymath