Update git remote URL from git.threefold.info to git.ourworld.tf

specs/models/library/book.v

@@ -0,0 +1,30 @@
+module library
+
+import freeflowuniverse.herolib.hero.models.core
+
+// TocEntry represents a table of contents entry for a book
+pub struct TocEntry {
+	// Title of the chapter/section
+	title string
+
+	// Page number (index in the pages array)
+	page u32
+
+	// Optional subsections
+	subsections []TocEntry
+}
+
+// Book represents a Book library item (collection of markdown pages with TOC)
+pub struct Book {
+	core.Base // Title of the book
+	title string @[index]
+
+	// Optional description of the book
+	description ?string
+
+	// Table of contents
+	table_of_contents []TocEntry
+
+	// Pages content (markdown strings)
+	pages []string
+}