cueseg: topic chapters from a transcript, and a worked pipeline in the readme

parity/golden/cueseg/sparse-text.tail.ndjson

@@ -0,0 +1,2 @@
+{"start": 0.0, "end": 901.0, "title": "The Mill Stood", "excerpt": "the mill stood"}
+{"start": 2703.0, "end": 3604.0, "title": "Parliament Dissolved Itself Again", "excerpt": "parliament dissolved itself again"}