feat: land superpaper v1 notes scaffold

Add the ledger schema, class router, lint codes, ingest/build
pipeline, and three work-tree examples: align derivation,
superfig delegation, and supertensor delegation.

README.md

@@ -45,6 +45,13 @@ skills/supertensor        -> superpaper/supertensor
 
 ## Status
 
-The family contract lives in [`DESIGN.md`](DESIGN.md). Figure children
-are usable now. The notes scaffold (`scripts/`, ledger, template) is
-the SuperPaper v1 PR chain in that document — not in this commit.
+v1 notes scaffold is in this repo: ledger schema, router, lint, ingest,
+and three `--work` examples (`excerpt-toy`, `pipeline-delegate`,
+`tensor-delegate`). `superderive` is still phase 2.
+
+```bash
+python3 -m venv .venv && .venv/bin/pip install -r requirements.txt
+./scripts/preflight.sh
+./scripts/test.sh
+./scripts/build.sh --work examples/excerpt-toy
+```