[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-front/src/modules/serverless-functions/utils/getDefaultFunctionInputFromInputSchema.ts

@@ -1,6 +1,6 @@
 import { InputSchema } from '@/workflow/types/InputSchema';
 import { FunctionInput } from '@/workflow/workflow-steps/workflow-actions/types/FunctionInput';
-import { isDefined } from '~/utils/isDefined';
+import { isDefined } from 'twenty-shared';
 
 export const getDefaultFunctionInputFromInputSchema = (
   inputSchema: InputSchema,

packages/twenty-front/src/modules/serverless-functions/utils/getFunctionInputFromSourceCode.ts

@@ -2,7 +2,7 @@ import { getDefaultFunctionInputFromInputSchema } from '@/serverless-functions/u
 import { getFunctionInputSchema } from '@/serverless-functions/utils/getFunctionInputSchema';
 import { FunctionInput } from '@/workflow/workflow-steps/workflow-actions/types/FunctionInput';
 import { isObject } from '@sniptt/guards';
-import { isDefined } from 'twenty-ui';
+import { isDefined } from 'twenty-shared';
 
 export const getFunctionInputFromSourceCode = (
   sourceCode?: string,

packages/twenty-front/src/modules/serverless-functions/utils/getFunctionInputSchema.ts

@@ -1,3 +1,5 @@
+import { InputSchema, InputSchemaProperty } from '@/workflow/types/InputSchema';
+import { isDefined } from 'twenty-shared';
 import {
   ArrayTypeNode,
   ArrowFunction,
@@ -5,17 +7,15 @@ import {
   FunctionDeclaration,
   FunctionLikeDeclaration,
   LiteralTypeNode,
+  Node,
   PropertySignature,
   ScriptTarget,
   StringLiteral,
   SyntaxKind,
   TypeNode,
-  Node,
   UnionTypeNode,
   VariableStatement,
 } from 'typescript';
-import { InputSchema, InputSchemaProperty } from '@/workflow/types/InputSchema';
-import { isDefined } from 'twenty-ui';
 
 const getTypeString = (typeNode: TypeNode): InputSchemaProperty => {
   switch (typeNode.kind) {

packages/twenty-front/src/modules/serverless-functions/utils/getFunctionOutputSchema.ts

@@ -1,7 +1,7 @@
 import { InputSchemaPropertyType } from '@/workflow/types/InputSchema';
 import { BaseOutputSchema } from '@/workflow/workflow-variables/types/StepOutputSchema';
 import { isObject } from '@sniptt/guards';
-import { isDefined } from 'twenty-ui';
+import { isDefined } from 'twenty-shared';
 
 const getValueType = (value: any): InputSchemaPropertyType => {
   if (!isDefined(value) || value === null) {