citefind: the references in a bibliography, and what could not be read off them

Cuts a reference list into entries — at the note numbers where there are any,
at the layout where there are not — and reads each as far as its punctuation
allows. Fields that would not parse are named in `unsettled` rather than
guessed at, and `--prompt` asks a model about exactly those and no others.

Over 202 real reference sections from the corpus: 8,566 references, 95% with
a title, 82% with a year, 46% settling every field with no model involved.
A title is refused where the entry was never divided, so no record reports
its own text back as the work it cites.

`ibid.` is flagged and left alone — it points at a work, and the entry does
not say which. A rule of dashes is filled in, because the style defines it as
the author above.

chunkmd gains `note_starts` and `cites_something`: recognising a page of
notes and splitting one are the same knowledge, and two copies of that
pattern would drift.

crates/citefind/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "citefind"
+description = "The references in a bibliography or a page of notes, one record each."
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+catena-cli.workspace = true
+chunkmd.workspace = true
+clap.workspace = true
+corpus-core.workspace = true
+idnorm.workspace = true
+regex.workspace = true
+schemars.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+
+[lints]
+workspace = true