feat(archetype): add template for new book pages

wowchemy/archetypes/book.md

@@ -0,0 +1,9 @@
+---
+# Documentation: https://wowchemy.com/docs/managing-content/
+
+title: "{{ replace .Name "-" " " | title }}"
+linktitle: "{{ replace .Name "-" " " | title }}"
+date: {{ .Date }}
+type: book
+summary: ""
+---