seriesof: the series a book belongs to, and which volume this is

parity/Cargo.toml

@@ -24,6 +24,7 @@ mdscrub.workspace = true
 mdsplit.workspace = true
 avplan.workspace = true
 pdfgutter.workspace = true
+seriesof.workspace = true
 pdftriage.workspace = true
 rrf.workspace = true
 corpus-core.workspace = true