[CHORE] Avoid isDefined duplicated reference, move it to twenty-shared (#9967)

# Introduction
Avoid having multiple `isDefined` definition across our pacakges
Also avoid importing `isDefined` from `twenty-ui` which exposes a huge
barrel for a such little util function

## In a nutshell
Removed own `isDefined.ts` definition from `twenty-ui` `twenty-front`
and `twenty-server` to move it to `twenty-shared`.
Updated imports for each packages, and added explicit dependencies to
`twenty-shared` if not already in place

Related PR https://github.com/twentyhq/twenty/pull/9941

packages/twenty-ui/src/utilities/index.ts

@@ -10,7 +10,6 @@ export * from './device/getOsControlSymbol';
 export * from './device/getOsShortcutSeparator';
 export * from './device/getUserDevice';
 export * from './dimensions/components/ComputeNodeDimensions';
-export * from './isDefined';
 export * from './responsive/hooks/useIsMobile';
 export * from './screen-size/hooks/useScreenSize';
 export * from './state/utils/createState';