chore: add frontmatter to examples for website (#8218)

Author: mcansh

docs/examples/auth.md

@@ -1,3 +1,8 @@
+---
+title: Authentication
+toc: false
+---
+
 # Auth Example
 
 This example demonstrates how to restrict access to routes to authenticated users.

docs/examples/basic.md

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+---
+title: Basics
+toc: false
+order: 1
+---
+
 # Basic Example
 
 This example demonstrates some of the basic features of React Router, including:

docs/examples/custom-filter-link.md

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+---
+title: Custom Filter Link
+toc: false
+---
+
 # Custom Filter Link Example
 
 This example demonstrates how to use a query string parameter to mark a link as "active" or not. This is a common technique when implementing a filter in a sidebar where you're browsing products.

docs/examples/custom-link.md

@@ -1,3 +1,8 @@
+---
+title: Custom Active Link
+toc: false
+---
+
 # Custom Link Example
 
 This example demonstrates how to make a custom `<Link>` component to render something different when the link is "active" using the `useMatch()` and `useResolvedPath()` hooks.

docs/examples/custom-query-parsing.md

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+---
+title: Custom Query Parsing
+toc: false
+---
+
 # Custom Query Parsing Example
 
 This example demonstrates how to store a complex data structure in the URL query string using a custom hook.

docs/examples/index.md

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+---
+title: Lazy Loading
+toc: false
+---
+
 # Lazy Loading Example
 
 This example demonstrates how to lazily load both

docs/examples/lazy-loading.md

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+---
+title: Modal
+toc: false
+---
+
 # Modal Example
 
 ## Preview

docs/examples/modal.md

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+---
+title: Multi App
+toc: false
+---
+
 # Multi App Example
 
 This example demonstrates how to build a site with multiple React Router apps by mounting each at a URL pathname prefix using the `<Router basename>` prop. This essentially decouples the apps from each other and allows them to be portable and even deployed separately.

docs/examples/multi-app.md

@@ -1,3 +1,8 @@
+---
+title: Route Objects
+toc: false
+---
+
 # Route Objects Example
 
 This example demonstrates how to use the `useRoutes()` hook to define and render routes using regular JavaScript objects instead of `<Routes>` and `<Route>` elements. This is mainly a stylistic preference that may make more sense in some scenarios, depending on the data structures you're working with to define your routes.

docs/examples/route-objects.md

@@ -1,3 +1,8 @@
+---
+title: Search Params
+toc: false
+---
+
 # Search Params Example
 
 This example demonstrates how to read and write the URL query string using the `useSearchParams()` hook. This hook is similar to the `useNavigate()` hook, but just for the [`search` portion of the URL](https://developer.mozilla.org/en-US/docs/Web/API/Location/search).

docs/examples/search-params.md

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+---
+title: Server Rendering
+toc: false
+---
+
 # Server-side Rendering Example
 
 This example adds [server-side rendering](https://reactjs.org/docs/react-dom-server.html) (SSR) to our basic example.