reading: split the book tracker into books, papers and articles (kind column + migration classifying 20 papers), segmented tabs with counts, article cards that open the link, owner + add link with server-side unfurl, kind switch on detail pages, /trackers/reading alias

src/lib/title.ts

@@ -18,7 +18,7 @@ export function getTitle(path: string, environment: SiteEnvironment = null): str
 		'/': 'Home',
 		'/projects': 'Projects',
 		'/trackers': 'Trackers',
-		'/trackers/books': 'Books',
+		'/trackers/books': 'Reading',
 		'/trackers/spotting': 'Spotting',
 		'/trackers/cars': 'Cars',
 		'/trackers/planes': 'Planes',