docs(js): Update Remix on Cloudflare quick start guide (#14873)

<!-- Use this checklist to make sure your PR is ready for merge. You may
delete any sections you don't need. -->

## DESCRIBE YOUR PR
Updated the Remix on Cloudflare quick start guide to follow our
template.

The main Remix quick start guide (manual setup) page and the Remix on
Cloudflare quick start guide page share the same file/content. We did
this for Nuxt/SvelteKit on Cloudflare too -> you can read more about it
#14679


Closes: #14845 

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## SLA

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## PRE-MERGE CHECKLIST

*Make sure you've checked the following before merging your changes:*

- [ ] Checked Vercel preview for correctness, including links
- [ ] PR was reviewed and approved by any necessary SMEs (subject matter
experts)
- [ ] PR was reviewed and approved by a member of the [Sentry docs
team](https://github.com/orgs/getsentry/teams/docs)


## EXTRA RESOURCES

- [Sentry Docs contributor guide](https://docs.sentry.io/contributing/)

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Unifies Remix and Remix on Cloudflare docs by introducing a shared
getting-started include and updating both pages to reference it.
> 
> - **Docs structure (Remix/Cloudflare)**:
> - **New shared include**: Add
`platform-includes/getting-started-complete/javascript.remix.mdx` with
full setup (client, server, Cloudflare middleware, source maps,
verification, next steps).
> - **Remix manual setup**: Replace detailed content in
`docs/platforms/javascript/guides/remix/manual-setup.mdx` with
`getting-started-complete` include.
> - **Remix on Cloudflare**: Replace bespoke instructions in
`docs/platforms/javascript/guides/cloudflare/frameworks/remix.mdx` with
the same include and update description.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
eed0186. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: Charly Gomez <[email protected]>
Co-authored-by: Onur Temizkan <[email protected]>

Author: 3 people

docs/platforms/javascript/guides/cloudflare/frameworks/hydrogen-remix.mdx

@@ -99,7 +99,9 @@ export default Sentry.withSentry(App, useEffect, useLocation, useMatches);
 Finally, update your `entry.client.tsx` file to initialize Sentry SDK on the client:
 
 ```tsx {filename:app/entry.client.tsx}
-import * as Sentry from "@sentry/remix";
+import * as Sentry from "@sentry/remix/cloudflare";
+import { useEffect } from "react";
+import { useLocation, useMatches } from "@remix-run/react";
 
 Sentry.init({
   dsn: "___PUBLIC_DSN___",

docs/platforms/javascript/guides/cloudflare/frameworks/nuxt.mdx

@@ -1,6 +1,6 @@
 ---
 title: Nuxt on Cloudflare
-description: "Learn how to instrument your Nuxt app on Cloudflare Workers and Pages and capture your first errors with Sentry. "
+description: "Learn how to instrument your Nuxt app on Cloudflare Workers and Pages and capture your first errors with Sentry."
 ---
 
 This guide will show you how to set up the SDK with Nitro's `cloudflare_module` (or their deprecated `cloudflare-pages`) deployment preset.

docs/platforms/javascript/guides/cloudflare/frameworks/remix.mdx

@@ -1,44 +1,9 @@
 ---
 title: Remix on Cloudflare
-description: "Learn how to add Cloudflare instrumentation to your Remix app."
+description: "Learn how to instrument your Remix app on Cloudflare Workers and Pages and capture your first errors with Sentry."
 ---
 
-If you're running your Remix app on Cloudflare Pages, you can use the Sentry Remix SDK in combination with the Sentry Cloudflare SDK to add Sentry instrumentation.
-
-## Install
-
-First, install the Sentry Remix SDK in your application. We recommend using the Sentry wizard to automatically install the SDK:
-
-```bash
-npx @sentry/wizard@latest -i remix
-```
-
-If the setup through the wizard doesn't work for you, you can also [set up the Remix SDK manually](/platforms/javascript/guides/remix/manual-setup/).
-
-After installing the Sentry Remix SDK, delete the newly generated `instrumentation.server.mjs` file. This instrumentation is not needed when using the Cloudflare SDK.
-
-Now you can install the Sentry Cloudflare SDK. First, install the SDK with your package manager:
-
-<PlatformContent includePath="getting-started-install" />
-
-## Setup
-
-The main Sentry configuration should happen as early as possible in your app's lifecycle.
-
-<PlatformContent includePath="getting-started-config" />
-
-Then create a `_middleware.js` file in your `functions` directory and add the following code:
-
-```javascript {filename:functions/_middleware.js}
-import * as Sentry from "@sentry/cloudflare";
-
-export const onRequest = [
-  // Make sure Sentry is the first middleware
-  Sentry.sentryPagesPlugin((context) => ({
-    dsn: "___PUBLIC_DSN___",
-    // Set tracesSampleRate to 1.0 to capture 100% of spans for tracing.
-    tracesSampleRate: 1.0,
-  })),
-  // Add more middlewares here
-];
-```
+<PlatformContent
+  includePath="getting-started-complete"
+  platform="javascript.remix"
+/>