New sidemenu for notes editor (#6527)

@Bonapara @lucasbordeau

This PR addresses issue #6489:

- Created an entire sidemenu for the block editor.

## Review Request

Please review the implementation of the custom sidemenu. 

## Outstanding Issues

1. Sidemenu Positioning:
   - The current placement is determined by the BlockNote package.
   - I need assistance in positioning it according to the Figma designs.
- Attempted adding margin to the sidemenu, but this solution doesn't
scale well across different screen sizes.

2. Props Spreading in `CustomSidemenu.tsx`:
- Unable to avoid props spreading due to the third-party BlockNote
components.
   - Added eslint-disable comments as a temporary solution.

Your insights on these challenges would be greatly appreciated,
especially regarding the sidemenu positioning and any potential
alternatives to props spreading.




https://github.com/user-attachments/assets/4914a037-a115-4189-88bc-a41d121d309d

---------

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

packages/twenty-front/src/modules/ui/layout/show-page/components/ShowPageActivityContainer.tsx

@@ -4,7 +4,7 @@ import { CoreObjectNameSingular } from '@/object-metadata/types/CoreObjectNameSi
 import styled from '@emotion/styled';
 
 const StyledShowPageActivityContainer = styled.div`
-  margin-top: ${({ theme }) => theme.spacing(2)};
+  margin-top: ${({ theme }) => theme.spacing(6)};
   width: 100%;
 `;
 export const ShowPageActivityContainer = ({