Migrated Developer Docs (#5683)

- Migrated developer docs to Twenty website

- Modified User Guide and Docs layout to include sections and
subsections

**Section Example:**
<img width="549" alt="Screenshot 2024-05-30 at 15 44 42"
src="https://github.com/twentyhq/twenty/assets/102751374/41bd4037-4b76-48e6-bc79-48d3d6be9ab8">

**Subsection Example:**
<img width="557" alt="Screenshot 2024-05-30 at 15 44 55"
src="https://github.com/twentyhq/twenty/assets/102751374/f14c65a9-ab0c-4530-b624-5b20fc00511a">


- Created different components (Tabs, Tables, Editors etc.) for the mdx
files

**Tabs & Editor**

<img width="665" alt="Screenshot 2024-05-30 at 15 47 39"
src="https://github.com/twentyhq/twenty/assets/102751374/5166b5c7-b6cf-417d-9f29-b1f674c1c531">

**Tables**

<img width="698" alt="Screenshot 2024-05-30 at 15 57 39"
src="https://github.com/twentyhq/twenty/assets/102751374/2bbfe937-ec19-4004-ab00-f7a56e96db4a">

<img width="661" alt="Screenshot 2024-05-30 at 16 03 32"
src="https://github.com/twentyhq/twenty/assets/102751374/ae95b47c-dd92-44f9-b535-ccdc953f71ff">

- Created a crawler for Twenty Developers (now that it will be on the
twenty website). Once this PR is merged and the website is re-deployed,
we need to start crawling and make sure the index name is
‘twenty-developer’
- Added a dropdown menu in the header to access User Guide and
Developers + added Developers to footer


https://github.com/twentyhq/twenty/assets/102751374/1bd1fbbd-1e65-4461-b18b-84d4ddbb8ea1

- Made new layout responsive

Please fill in the information for each mdx file so that it can appear
on its card, as well as in the ‘In this article’ section. Example with
‘Getting Started’ in the User Guide:

<img width="786" alt="Screenshot 2024-05-30 at 16 29 39"
src="https://github.com/twentyhq/twenty/assets/102751374/2714b01d-a664-4ddc-9291-528632ee12ea">

Example with info and sectionInfo filled in for 'Getting Started':

<img width="620" alt="Screenshot 2024-05-30 at 16 33 57"
src="https://github.com/twentyhq/twenty/assets/102751374/bc69e880-da6a-4b7e-bace-1effea866c11">


Please keep in mind that the images that are being used for Developers
are the same as those found in User Guide and may not match the article.

---------

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

packages/twenty-website/src/content/twenty-ui/input/image-input.mdx

@@ -0,0 +1,38 @@
+---
+title: Image Input
+icon: TbUpload
+image: /images/user-guide/objects/objects.png
+---
+
+import Tabs from '@theme/Tabs';
+import TabItem from '@theme/TabItem';
+import { SandpackEditor} from '@site/src/ui/SandpackEditor'
+import imageInputCode from '!!raw-loader!@site/src/ui/input/components/imageInputCode.js'
+
+Allows users to upload and remove an image. 
+
+<ArticleTabs label1="Usage" label2="Props">
+<ArticleTab>
+
+<SandpackEditor content={`import { ImageInput } from "@/ui/input/components/ImageInput";
+
+export const MyComponent = () => {
+  return <ImageInput/>;
+};`} />
+
+</ArticleTab>
+<ArticleTab>
+
+<ArticlePropsTable options={[
+  ['picture', 'string', 'The image source URL', ''],
+  ['onUpload', 'function', 'The function called when a user uploads a new image. It receives the `File` object as a parameter', ''],
+  ['onRemove', 'function', 'The function called when the user clicks on the remove button', ''],
+  ['onAbort', 'function', 'The function called when a user clicks on the abort button during image upload', ''],
+  ['isUploading', 'boolean', 'Indicates whether an image is currently being uploaded', '`false`'],
+  ['errorMessage', 'string', 'An optional error message to display below the image input', ''],
+  ['disabled', 'boolean', 'If `true`, the entire input is disabled, and the buttons are not clickable', '`false`']
+]} />
+
+
+</ArticleTab>
+</ArticleTabs>