docs: update README with new features and installation guide

Added details about displaying the latest articles on the homepage,
author fields, and call-to-action buttons. Included a new installation
guide and license information. Enhances user understanding and ease of
theme setup.

README.md

@@ -7,6 +7,7 @@ This is the WordPress theme for the Duck Behavior Journal website. It is a custo
 It includes:
 
 - Custom post type for articles
+  - Latest articles on the homepage
   - Field to list authors
     - Lead author "et al." is listed on the index and archive pages
   - Field for "DOI" (Digital Object Identifier)
@@ -16,3 +17,18 @@ It includes:
     - DOI resolver (https://example.com/nn.nnnn/xyz* forwards to the respective article)
 
 - Custom post type for letters to the editor
+  - Field to list authors
+    - Lead author "et al." is listed on the index and archive pages
+
+- Call to action buttons on the homepage
+  - Configurable in Customizer
+
+## Installation
+
+1. Clone this repository into your WordPress themes directory
+2. Activate the theme in the WordPress admin panel
+3. Configure the theme in the Customizer
+
+## License
+
+This theme is licensed under the MIT license. See the [LICENSE](LICENSE) file for more information.