add Vite and related frameworks readme (firebase#6289)

* add svelte.md

* consolidate to vite.md

* pr comments

src/frameworks/docs/lit.md

@@ -0,0 +1,3 @@
+# Integrate Lit
+
+Lit support is built on the Vite framework integration. See [vite.md](./vite.md) for full guidance.

src/frameworks/docs/preact.md

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+# Integrate Preact
+
+Preact support is built on the Vite framework integration. See [vite.md](./vite.md) for full guidance.

src/frameworks/docs/react.md

@@ -1,50 +1,3 @@
 # Integrate React
 
-Using the Firebase CLI, you can deploy your React static web apps to Firebase 
-and serve them with Firebase Hosting.
-
-Note: Framework-aware Hosting is an early public preview. This means
-that the functionality might change in backward-incompatible ways. A preview
-release is not subject to any SLA or deprecation policy and may receive limited
-or no support.
-
-## Before you begin
-
-Before you get started deploying your app to Firebase,
-review the following requirements and options:
-
-- Firebase CLI version 12.1.0 or later. Make sure to
-  [install the CLI](https://firebase.google.com/docs/cli#install_the_firebase_cli) using your preferred 
-	method.
-- Optional: An existing React project using Vite. You can create one with 
-	`npm create vite@latest -- --template react` or let the Firebase CLI
-	 [initialize a new project](#initialize-a-new-project) for you.
-
-
-## Initialize Firebase
-
-To get started, initialize Firebase for your framework project.
-Use the Firebase CLI for a new project, or modify `firebase.json` for an
-existing project.
-
-### Initialize a new project
-
-1. In the Firebase CLI, enable the web frameworks preview:
-   <pre class="devsite-terminal">firebase experiments:enable webframeworks</pre>
-1. Run the initialization command from the CLI and then follow the prompts:
-   <pre class="devsite-terminal">firebase init hosting</pre>
-1.  Answer yes to "Do you want to use a web framework? (experimental)"
-1.  Choose your hosting source directory.  If there is an existing React 
-    codebase (with Vite), the CLI detects it and the process completes.
-
-## Serve static content
-
-After initializing Firebase, you can serve static content with the standard
-deployment command:
-
-```shell
-firebase deploy
-```
-
-You can [view your deployed app](/docs/hosting/test-preview-deploy#view-changes)
-on its live site.
+React support is built on the Vite framework integration. See [vite.md](./vite.md) for full guidance.

src/frameworks/docs/svelte.md

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+# Integrate Svelte
+
+Svelte support is built on the Vite framework integration. See [vite.md](./vite.md) for full guidance.

src/frameworks/docs/vite.md

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+# Integrate Vite
+
+Using the Firebase CLI, you can deploy your Vite-powered sites to Firebase 
+and serve them with Firebase Hosting. The following instructions also apply
+to React, Preact, Lit, and Svelte as they are built on the Vite integration.
+
+Note: Framework-aware Hosting is an early public preview. This means
+that the functionality might change in backward-incompatible ways. A preview
+release is not subject to any SLA or deprecation policy and may receive limited
+or no support.
+
+## Before you begin
+
+Before you get started deploying your app to Firebase,
+review the following requirements and options:
+
+- Firebase CLI version 12.1.0 or later. Make sure to
+  [install the CLI](https://firebase.google.com/docs/cli#install_the_firebase_cli) using your preferred 
+	method.
+- Optional: An existing Vite project. You can create one with 
+	`npm create vite@latest` or let the Firebase CLI
+	initialize a new project for you.
+
+
+## Initialize Firebase
+
+To get started, initialize Firebase for your framework project.
+Use the Firebase CLI for a new project, or modify `firebase.json` for an
+existing project.
+
+### Initialize a new project
+
+1. In the Firebase CLI, enable the web frameworks preview:
+   <pre class="devsite-terminal">firebase experiments:enable webframeworks</pre>
+1. Run the initialization command from the CLI and then follow the prompts:
+   <pre class="devsite-terminal">firebase init hosting</pre>
+1.  Answer yes to "Do you want to use a web framework? (experimental)"
+1.  Choose your hosting source directory.  If there is an existing Vite codebase, 
+   the CLI detects it and the process completes.
+
+## Serve static content
+
+After initializing Firebase, you can serve static content with the standard
+deployment command:
+
+```shell
+firebase deploy
+```
+
+You can [view your deployed app](https://firebase.google.com/docs/hosting/test-preview-deploy#view-changes)
+on its live site.