Created the user-guide content (Text and illustrations) (#4683)

* Second attempt

* Small image optimizations

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Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-website/src/content/user-guide/create-workspace.mdx

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+---
+title: Create a Workspace
+info: Follow a step-by-step guide on how to register on Twenty, choose a subscription plan, confirm your payment and set up your account, with additional advice on seeking assistance if needed.
+icon: IconNote
+image: /images/user-guide/placeholder-header.png
+---
+
+# Step 1: Registration
+1. Navigate to [Twenty Sign Up](https://app.twenty.com/sign-up).
+2. Select your preferred sign-up method:
+    - **Continue with Google** for Google account registration.
+    - Or, **Continue With Email** for email registration.
+
+<div style={{padding:'69.01% 0 0 0', position:'relative'}}>
+  <iframe 
+    src="https://player.vimeo.com/video/927066829?autoplay=1&loop=1&autopause=0&background=1&amp;app_id=58479" 
+    frameborder="0" 
+    allow="autoplay; fullscreen; picture-in-picture; clipboard-write" 
+    style={{
+      position:'absolute',
+      top:0,
+      left:0,
+      width:'100%',
+      height:'100%',
+      borderRadius: '16px', 
+      border:'2px solid black'
+    }}
+    title="Export data"
+  ></iframe>
+</div>
+<script src="https://player.vimeo.com/api/player.js"></script>
+
+# Step 2: Choosing A Subscription Plan
+Choose a subscription plan after completing the 7-day free trial. Twenty offers the most competitive pricing in the market.
+
+## Monthly Plan
+At $9 per seat per month, this plan offers absolute freedom to cancel at any time.
+
+## Annual Plan
+At $90 per seat per year, this plan provides an annual saving of $18 compared to the Monthly Plan.
+
+Both plans give full access to all Twenty features, including unlimited contacts, email integration, custom objects, API & Webhooks, and frequent updates.
+
+<img src="/images/user-guide/create-workspace/choose-plan.png" style={{width:'100%'}}/>
+
+# Step 3: Payment Confirmation & Account Setup
+Post payment approval via Stripe, you're directed to create your workspace and user profile. Remember that you can cancel your subscription anytime.
+
+# Support
+For queries or help, connect with the dedicated support team at [contact@twenty.com](mailto:contact@twenty.com) or send a message on [Discord](https://discord.gg/cx5n4Jzs57)