Doc addition & changes (#2152)

* refactored Storybook UI

* refactored Storybook UI

* removed extra cards from the doc, added card for ui components

* added hover behavior to doc page & made it look selected

* separate storybook docs and tests

* separating storybook tests and docs

* fixed spelling errors in docs

* Final round of edits for frontend, added backend folder architecture

* Created CODE_OF_CONDUCT.md

* Add code of conduct to contributing.md

* doc changes

* fixed broken links

* doc addition and changes

docs/docs/start/overview.mdx

@@ -1,28 +0,0 @@
----
-title: Overview
-sidebar_position: 0
-sidebar_custom_props:
-  icon: TbBolt
----
-import ThemedImage from '@theme/ThemedImage';
-
-
-
-Twenty is an Open Source CRM that provides flexibility, tailored to your business needs. It helps you break free from vendor lock-in and limitations, and provides the tools needed to harness the full potential of your data while ensuring a sleek and effortlessly intuitive design that teams will love to use.  
-<ThemedImage sources={{light: "../img/light-doc-preview.png", dark:"../img/dark-doc-preview.png"}} style={{width:'100%', maxWidth:'800px'}}/>
-
-___
-
-## Why did we create Twenty?
-We’ve spent thousands of hours grappling with traditional CRMs like Pipedrive and Salesforce to align them with our business needs, only to end up frustrated—customizations are complex and the closed ecosystems of these platforms can feel restrictive.
-
-We felt the need for a CRM solution that empowers rather than constrains, which inspired us to create Twenty. We’re building the next-generation open-source CRM that offers you the flexibility to shape it according to your business objectives and meet your team’s unique needs. We’ve packed Twenty with powerful features to give you full control and help you win more deals. 
-___
-
-## Contributing
-
-Contributions are what makes the open source community such an amazing place.  
-
-Code contributions through pull request are most welcome. See our [local setup guide](../contributor/local-setup) to get started.
-
-You can also contribute by creating an issue to report a bug you've spotted, joining our discussions or writing documentation.