add example book in example site

exampleSite/content/exampleBook/_index.md

@@ -0,0 +1,17 @@
+---
+title: Probably A Book
+subtitle: Best book ever!
+type: book
+layout: all
+draft: true
+---
+This is a layout showcase for:
+
+```yaml
+type: book
+layout: all
+```
+
+Change `all` to `volumes` to hide chapters.
+
+Below lists all volumes and chapters in this book alphabetically. If you see repetitions, just restart the hugo server and it should be fixed.

exampleSite/content/exampleBook/vol-1/_index.md

@@ -0,0 +1,13 @@
+---
+title: Volume 1. Good Volume
+type: book
+layout: chapters
+---
+This is a layout showcase for:
+
+```yaml
+type: book
+layout: chapters
+```
+
+Below lists all chapters in this volume alphabetically. If you see repetitions, just restart the hugo server and it should be fixed.

exampleSite/content/exampleBook/vol-1/vol-1-ch-1.md

@@ -0,0 +1,3 @@
+---
+title: Chapter 1. Good Chapter
+---

exampleSite/content/exampleBook/vol-1/vol-1-ch-2.md

@@ -0,0 +1,3 @@
+---
+title: Chapter 2. Better Chapter
+---

exampleSite/content/exampleBook/vol-2/_index.md

@@ -0,0 +1,14 @@
+---
+title: Volume 2. Cool Volume
+type: book
+layout: chapters
+draft: true
+---
+This is a layout showcase for:
+
+```yaml
+type: book
+layout: chapters
+```
+
+Below lists all chapters in this volume alphabetically. If you see repetitions, just restart the hugo server and it should be fixed.

exampleSite/content/exampleBook/vol-2/vol-2-ch-1.md

@@ -0,0 +1,3 @@
+---
+title: Chapter 3. Cool Chapter
+---

exampleSite/content/exampleBook/vol-2/vol-2-ch-2.md

@@ -0,0 +1,3 @@
+---
+title: Chapter 4. Cooler Chapter
+---

exampleSite/content/exampleBook/vol-2/vol-2-ch-3.md

@@ -0,0 +1,4 @@
+---
+title: Chapter 5. Coolest Chapter
+draft: true
+---