[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-server/src/engine/api/rest/core/query-builder/utils/filter-utils/format-field-values.utils.ts

@@ -1,9 +1,8 @@
 import { BadRequestException } from '@nestjs/common';
 
-import { FieldMetadataType } from 'twenty-shared';
+import { FieldMetadataType, isDefined } from 'twenty-shared';
 
 import { FieldValue } from 'src/engine/api/rest/core/types/field-value.type';
-import { isDefined } from 'src/utils/is-defined';
 
 export const formatFieldValue = (
   value: string,