Carry what the files state for OCS, polylines, text, viewports and layouts (0.3 port, 1/3)

README.md

@@ -18,7 +18,8 @@ depend on it alone.
 
 - **Entities** — `Entity` and one struct per kind, each carrying a reference ID, a provenance and
   a confidence, with a three-state `Ref` for every reference and plain `Point2D` / `Point3D`.
-- **Tables** — `Tables`: layers, block definitions, dimension styles, mline styles.
+- **Tables** — `Tables`: layers, block definitions, dimension styles, mline styles, and the
+  layouts with their plot settings.
 - **Placement** — `Affine2`, the transform a block reference applies to its block, composed across
   nested references.
 - **Palette and diagnostics** — the ACI colour table and the reader diagnostics a drawing carries.

docs/PORT_STATUS.md

@@ -0,0 +1,7 @@
+# Port status
+
+This branch (`integrate/0.3`) is part of a three-repository port handed over to
+upstream on 2026-09-23. The full status, the local setup for building the three
+repositories together, what remains and the pull-request descriptions are in the
+uncad repository on the same branch: `docs/PORT_STATUS.md` and
+`docs/UPSTREAM_PR_DRAFTS.md` (https://github.com/iyulab/uncad/tree/integrate/0.3/docs).