Big documentation rewrite, move docs to example site

exampleSite/content.en/posts/example-post.md

@@ -0,0 +1,31 @@
+---
+title: "Example Blog Post"
+date: 2025-01-15
+tags: ["hugo", "theme"]
+categories: ["Example"]
+---
+
+This is an example blog post demonstrating the Hugo Book blog layout.
+
+## What This Demonstrates
+
+Blog posts in Hugo Book support standard Hugo content features:
+
+- **Date display**: configured via `BookDateFormat`
+- **Tags and categories**: displayed as metadata
+- **Pagination**: automatic when multiple posts exist
+- **Prev/next navigation**: links between posts in the section
+
+## Adding Your Own Posts
+
+Create markdown files under `content/posts/`:
+
+```
+content/
+└── posts/
+    ├── _index.md
+    ├── first-post.md
+    └── second-post.md
+```
+
+Each post needs at minimum a `title` and `date` in frontmatter. See [Blog](/docs/content/blog/) for full documentation.