docs: add new UI registry guide page

- Add comprehensive registry guide for ToolHive UI users
- Cover built-in registry browsing and server discovery
- Include server details view with metadata and tools listing
- Document registry settings with all three options (Default, Remote URL, Local File Path)
- Provide step-by-step workflow for local registry configuration
- Add navigation guidance, next steps, and related information links
- Follow CLAUDE.md guidelines for tone, style, and formatting
- Ensure consistency with CLI guide and custom registry tutorial

Author: samuv

docs/toolhive/guides-ui/registry.mdx

@@ -0,0 +1,106 @@
+---
+title: Explore the registry
+description: How to use the built-in or custom registry to find MCP servers.
+---
+
+import useBaseUrl from '@docusaurus/useBaseUrl';
+import ThemedImage from '@theme/ThemedImage';
+
+ToolHive includes a built-in registry of MCP servers with verified
+configurations that meet a
+[minimum quality standard](../concepts/registry-criteria.md), allowing you to
+discover and deploy high-quality tools effortlessly. You can browse the
+registry, select servers, and run them securely through the user interface.
+
+You can also configure ToolHive to use a custom registry instead. This is useful
+for organizations that want to maintain their own private registry of MCP
+servers.
+
+## Find MCP servers
+
+The ToolHive interface includes a dedicated **Registry** section in the main
+menu. This section lets you explore the various MCP servers available in either
+the built-in or custom registry.
+
+<ThemedImage
+  alt='Toolhive Registry Page'
+  sources={{
+    light: useBaseUrl('/img/toolhive/toolhive-ui-registry-light.webp'),
+    dark: useBaseUrl('/img/toolhive/toolhive-ui-registry-dark.webp'),
+  }}
+  title='Toolhive Registry Page'
+></ThemedImage>
+
+The registry interface displays servers with their:
+
+- **Name and description**: Brief overview of what the server does
+- **Tier**: Shows whether the server is **Official** (verified by ToolHive) or
+  **Community** (contributed by the community)
+- **Status**: Indicates if the server is currently **Active** and available
+- **Tools**: List of capabilities the server provides
+- **Popularity**: Star count and download statistics to help identify
+  widely-used servers
+
+You can browse through the list, use search functionality, and click on any
+server to view detailed information before installing it.
+
+## View server details
+
+Click on any server in the registry to view detailed information including:
+
+- Complete description and usage information
+- List of available tool names
+- Server metadata (tier, transport, popularity, provenance)
+- Installation and configuration options
+
+This detailed view helps you understand the server's purpose and requirements
+before adding it to your ToolHive installation.
+
+## Registry settings
+
+To configure your registry, ToolHive provides a dedicated **Registry** settings
+section in **Settings** → **Registry** with three options:
+
+- **Default Registry** - Use ToolHive's built-in verified registry
+- **Remote Registry (URL)** - Specify a custom URL for a remote registry hosted
+  on a web server
+- **Local Registry (File Path)** - Specify a local file path to a JSON registry
+  file on your system
+
+When you select **Local Registry (File Path)**, an additional **Registry File
+Path** field appears where you need to provide the absolute path to your local
+JSON registry file (for example: `/path/myregistry/db.json`). Click **Save** to
+apply your configuration.
+
+For detailed information on creating a custom registry, see the
+[custom registry tutorial](../tutorials/custom-registry.mdx).
+
+<ThemedImage
+  alt='Registry settings showing Local Registry File Path option selected with Registry File Path input field'
+  sources={{
+    light: useBaseUrl('/img/toolhive/toolhive-ui-registry-settings-light.webp'),
+    dark: useBaseUrl('/img/toolhive/toolhive-ui-registry-settings-dark.webp'),
+  }}
+  title='Local Registry configuration with file path input field'
+></ThemedImage>
+
+## Next steps
+
+After exploring the registry and finding servers you want to use:
+
+- **Install servers**: Click on servers from the registry to install and
+  configure them for your environment
+- **Manage running servers**: Use the **MCP Servers** section to start, stop,
+  and monitor your installed servers
+- **Create custom registries**: Set up your own private registry for
+  organization-specific servers
+
+## Related information
+
+- [Install ToolHive UI](./install.mdx) - Get started with ToolHive
+- [Run MCP servers](./run-mcp-servers.md) - Install and manage servers from the
+  registry
+- [Custom registry tutorial](../tutorials/custom-registry.mdx) - Create your own
+  MCP server registry
+- [Registry criteria](../concepts/registry-criteria.md) - Quality standards for
+  built-in registry servers