feat: migrate docs from Nextra to Fumadocs (#606)

* feat: checkpoint

* feat: Migrate docs to Fumadocs

* chore: docs layout

* chore:
- remove home route
- make docs home route
- remove docs prefix

* chore: docs layout

* chore:
- reorder sidebar
- fix home page redirect

* chore: rename package to avoid error during pnpm clean

* chore: remove private and sideEffects properties from package.json

* chore: requested fixes

* feat: update fumadocs layout

* feat: hide theme switch on sidebar

* add /docs

* feat: enhance documentation and layout with new guides and updates

- Added multiple how-to guides for creating courses, exercises, and managing organization settings.
- Updated existing documentation for clarity and consistency, including renaming sections for better navigation.
- Introduced new assets such as logos and favicon for improved branding.
- Modified layout components to enhance user experience and visual appeal.
- Updated package dependencies to include lucide-react for icon usage.

* chore: update pnpm-lock.yaml with dependency version changes

* add favicon

* fix: update links in documentation for consistency

- Corrected the links in the create-exercise and signup guides to ensure they point to the correct paths, enhancing clarity and navigation for users.

* delete docs

---------

Co-authored-by: Rotimi Best <best@classroomio.com>

apps/docs-v2/content/docs/contributor-guides/demo-accounts.mdx

@@ -0,0 +1,34 @@
+---
+title: Login with Demo Accounts
+description: Quick login guide using demo accounts for testing.
+---
+
+import { Callout } from 'fumadocs-ui/components/callout';
+
+This guide will help you get started quickly once you setup our local environment and you want to start using the [dashboard](https://app.classroomio.com).
+
+<Callout>
+  The assumption of this guide is that you've gone through our README and you've setup `supabase`
+  and you have `dashboard` running locally.
+</Callout>
+
+## Admin Login Credentials
+
+Once you have the `dashboard` service running locally and you have setup supabase, we added seed data that can allow you access an admin account to a demo organization and a student account to a student dashboard. This allows you see what ClassroomIO can do quickly without trying to figure it out.
+
+**Login:** admin@test.com
+
+**Password:** 123456
+
+<div style={{ display: 'flex', justifyContent: 'center', marginY: '16px' }}>
+  <iframe
+    width="560"
+    height="315"
+    src="https://www.youtube.com/embed/RfE4tQ_BEds?si=uXpYKokMg4SWMkQX"
+    title="YouTube video player"
+    frameBorder="0"
+    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
+    allowFullScreen
+    style={{ borderRadius: '8px' }}
+  ></iframe>
+</div>