feat: dominium standalone — simulador de campo medio sobre Llimphi

Front-door publicable de dominium: los 9 crates propios como path
members; Llimphi, app-bus, rimay-localize, wawa-config y pluma-notebook
por git-dep al monorepo tawasuyu.git (branch=main). cargo check
--workspace --all-targets pasa exit 0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

01_yachay/dominium/dominium-iso/README.md

@@ -0,0 +1,19 @@
+# dominium-iso
+
+> 30° projection + Lambert shadow for [dominium](../README.md).
+
+Pure math of isometric projection: `(x, y, z_world) → (sx, sy_screen)` at 30° angle with configurable scale. Lambert shadow proportional to dot product between normal and light. Zero graphics deps — this produces coordinates, [`dominium-render-plan`](../dominium-render-plan/README.md) uses them.
+
+## API
+
+```rust
+use dominium_iso::{project, lambert};
+
+let (sx, sy) = project(x, y, z, scale);
+let shade = lambert(normal, light);
+```
+
+## Deps
+
+- `libm`
+- Zero external deps