adds descriptions to all pages

Author: arthurfiorette

packages/docs/docs/guide/async/async-components.md

@@ -1,3 +1,9 @@
+---
+description:
+  Use async function components, understand promise propagation, and know when JSX results
+  must be awaited.
+---
+
 # Async Components
 
 A Kita Html component can be an `async` function. When it is, the JSX expression evaluates

packages/docs/docs/guide/async/error-boundaries.md

@@ -1,3 +1,9 @@
+---
+description:
+  Catch errors from async components with ErrorBoundary, handle fallback failures, and
+  combine boundaries with Suspense.
+---
+
 # Error Boundaries
 
 Error boundaries catch errors thrown by async components and render a fallback instead of

packages/docs/docs/guide/async/streaming-internals.md

@@ -1,3 +1,9 @@
+---
+description:
+  Understand the HTML, template, script, and chunked transfer protocol behind Suspense
+  streaming.
+---
+
 # Streaming Internals
 
 This page describes how Suspense streaming works at the protocol level, from the initial

packages/docs/docs/guide/async/suspense.md

@@ -1,3 +1,9 @@
+---
+description:
+  Conceptual guide to Suspense streaming, request isolation, and when progressive async
+  rendering is worth using.
+---
+
 # Suspense Streaming
 
 Without Suspense, the server must wait for every async component to resolve before sending

packages/docs/docs/guide/async/using-suspense.md

@@ -1,3 +1,9 @@
+---
+description:
+  Wrap async sections with Suspense, stream fallbacks, handle errors, share request IDs,
+  and avoid async fallback delays.
+---
+
 # Using Suspense
 
 Import `Suspense` and `renderToStream` from `@kitajs/html/suspense`.

packages/docs/docs/guide/getting-started.mdx

@@ -1,3 +1,9 @@
+---
+description:
+  Install Kita Html, configure TypeScript, enable the XSS plugin, and verify the scanner
+  catches unsafe JSX.
+---
+
 import { PackageManagerTabs } from '@rspress/core/theme'
 
 # Getting Started

packages/docs/docs/guide/how-jsx-becomes-html.mdx

@@ -1,3 +1,9 @@
+---
+description:
+  Follow the compile-time JSX rewrite and the runtime steps that turn props and children
+  into HTML strings.
+---
+
 # How JSX Becomes HTML
 
 The transformation from JSX to an HTML string happens in two stages: a compile-time

packages/docs/docs/guide/introduction.mdx

@@ -1,3 +1,9 @@
+---
+description:
+  Overview of Kita Html's string-based JSX runtime, XSS protection model, async
+  components, and package structure.
+---
+
 import { Tab, Tabs } from '@rspress/core/theme'
 
 # What is Kita Html

packages/docs/docs/guide/jsx/design-decisions.md

@@ -1,3 +1,9 @@
+---
+description:
+  Architectural rationale for omitting context and for defining JSX.Element as string or
+  Promise<string>.
+---
+
 # Design Decisions
 
 This page documents the major architectural decisions in Kita Html and their rationale.

packages/docs/docs/guide/jsx/extending-types.md

@@ -1,3 +1,9 @@
+---
+description:
+  Extend JSX.IntrinsicElements and HtmlTag to support custom elements, custom attributes,
+  or unrestricted tags.
+---
+
 # Extending JSX Types
 
 Kita Html's type system can be extended to support custom elements, custom attributes, or