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

specs/models/library/pdf.v

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+module library
+
+import freeflowuniverse.herolib.hero.models.core
+
+// Pdf represents a PDF document library item
+pub struct Pdf {
+	core.Base // Title of the PDF
+	title string @[index]
+
+	// Optional description of the PDF
+	description ?string
+
+	// URL of the PDF file
+	url string
+
+	// Number of pages in the PDF
+	page_count u32
+}