Big documentation rewrite, move docs to example site

exampleSite/content.en/docs/content/blog.md

@@ -0,0 +1,54 @@
+---
+weight: 3
+---
+
+# Blog
+
+Hugo Book includes templates for blog-style posts with dates, tags, and pagination. Blog functionality is very basic.
+
+## Setup
+
+Create a `posts/` section in your content directory
+
+```
+content/
+└── posts/
+    ├── _index.md
+    └── my-first-post.md
+```
+
+Add the blog section to a menu so readers can find it
+
+```yaml
+---
+title: Blog
+menu:
+  after:
+    weight: 5
+---
+```
+
+## Post Frontmatter
+
+```yaml
+---
+title: "My First Post"
+date: 2025-01-15
+tags: ["hugo", "documentation"]
+categories: ["Guides"]
+---
+```
+
+## Thumbnails
+
+Posts can display a thumbnail image. By default the theme looks for a file matching `thumbnail.*` in the post's page bundle. Override the pattern per-post
+
+```yaml
+---
+bookPostThumbnail: "cover.*"
+---
+```
+
+## Date Format
+
+The date display format is configured site-wide via `BookDateFormat`. See [Configuration](/docs/configuration/) for details.