fix: added self hosting and cleaned up mermaid diagram and icons for docs components

Author: Kapil Gowru

fern/products/docs/pages/getting-started/project-structure.mdx

@@ -68,7 +68,7 @@ The `assets` folder contains any images or videos used in your documentation. Yo
 
 The `docs.yml` file is the heart of your Fern documentation site. This configuration file controls your documentation's navigation structure, visual design, site functionality, and hosting settings.
 
-The example below shows the `docs.yml` configuration used for this documentation site. Notice how it defines the navigation hierarchy, branding elements, and site behavior in a single, readable file.
+The example below shows an example `docs.yml` file that defines the navigation hierarchy, branding elements, and site behavior in a single file.
 
 For complete configuration options, see the [docs.yml reference](/docs/customization/what-is-docs-yml).