feat: enforce @/ alias for imports and fix all relative parent imports (#16787)

## Summary
This PR enforces the use of `@/` alias for imports instead of relative
parent imports (`../`).

## Changes

### ESLint Configuration
- Added `no-restricted-imports` pattern in `eslint.config.react.mjs` to
block `../*` imports with the message "Relative parent imports are not
allowed. Use @/ alias instead."
- Removed the non-working `import/no-relative-parent-imports` rule
(doesn't work properly in ESLint flat config)

### VS Code Settings
- Added `javascript.preferences.importModuleSpecifier: non-relative` to
`.vscode/settings.json` (TypeScript setting was already there)

### Code Fixes
- Fixed **941 relative parent imports** across **706 files** in
`packages/twenty-front`
- All `../` imports converted to use `@/` alias

## Why
- Consistent import style across the codebase
- Easier to move files without breaking imports
- Better IDE support for auto-imports
- Clearer understanding of where imports come from

packages/twenty-front/src/modules/object-record/cache/utils/__tests__/createCacheEdgeWithRecordRef.test.ts

@@ -5,7 +5,7 @@ import { type ObjectMetadataItem } from '@/object-metadata/types/ObjectMetadataI
 import { type RecordGqlNode } from '@/object-record/graphql/types/RecordGqlNode';
 import { type ToReferenceFunction } from '@apollo/client/cache/core/types/common';
 
-import { createCacheEdgeWithRecordRef } from '../createCacheEdgeWithRecordRef';
+import { createCacheEdgeWithRecordRef } from '@/object-record/cache/utils/createCacheEdgeWithRecordRef';
 
 describe('createCacheEdgeWithRecordRef', () => {
   it('should create an edge with reference when toReference returns a reference', () => {

packages/twenty-front/src/modules/object-record/cache/utils/__tests__/filterRecordOnGqlFields.test.ts

@@ -1,4 +1,4 @@
-import { filterRecordOnGqlFields } from '../filterRecordOnGqlFields';
+import { filterRecordOnGqlFields } from '@/object-record/cache/utils/filterRecordOnGqlFields';
 
 describe('filterRecordOnGqlFields', () => {
   it('should filter fields based on recordGqlFields with true values', () => {

packages/twenty-front/src/modules/object-record/cache/utils/__tests__/getFieldMetadataFromGqlField.test.ts

@@ -1,7 +1,7 @@
 import { type FieldMetadataItem } from '@/object-metadata/types/FieldMetadataItem';
 import { RelationType } from 'twenty-shared/types';
 import { FieldMetadataType } from '~/generated-metadata/graphql';
-import { getFieldMetadataFromGqlField } from '../getFieldMetadataFromGqlField';
+import { getFieldMetadataFromGqlField } from '@/object-record/cache/utils/getFieldMetadataFromGqlField';
 
 const objectMetadataItemGenerator = (relationType: RelationType) => {
   return {

packages/twenty-front/src/modules/object-record/cache/utils/__tests__/getRecordFromRecordNode.test.ts

@@ -1,4 +1,4 @@
-import { getRecordFromRecordNode } from '../getRecordFromRecordNode';
+import { getRecordFromRecordNode } from '@/object-record/cache/utils/getRecordFromRecordNode';
 
 describe('getRecordFromRecordNode', () => {
   it('should convert a simple record node', () => {

packages/twenty-front/src/modules/object-record/cache/utils/__tests__/getRecordNodeFromRecord.test.ts

@@ -3,7 +3,7 @@ import { type ObjectMetadataItem } from '@/object-metadata/types/ObjectMetadataI
 import { getPeopleRecordConnectionMock } from '~/testing/mock-data/people';
 
 import { generatedMockObjectMetadataItems } from '~/testing/utils/generatedMockObjectMetadataItems';
-import { getRecordNodeFromRecord } from '../getRecordNodeFromRecord';
+import { getRecordNodeFromRecord } from '@/object-record/cache/utils/getRecordNodeFromRecord';
 
 const peopleMock = getPeopleRecordConnectionMock();
 

packages/twenty-front/src/modules/object-record/cache/utils/__tests__/isObjectRecordConnection.test.ts

@@ -1,4 +1,4 @@
-import { isObjectRecordConnection } from '../isObjectRecordConnection';
+import { isObjectRecordConnection } from '@/object-record/cache/utils/isObjectRecordConnection';
 
 describe('isObjectRecordConnection', () => {
   it('should return true for valid connection with edges', () => {

packages/twenty-front/src/modules/object-record/cache/utils/__tests__/isObjectRecordConnectionWithRefs.test.ts

@@ -1,4 +1,4 @@
-import { isObjectRecordConnectionWithRefs } from '../isObjectRecordConnectionWithRefs';
+import { isObjectRecordConnectionWithRefs } from '@/object-record/cache/utils/isObjectRecordConnectionWithRefs';
 
 describe('isObjectRecordConnectionWithRefs', () => {
   it('should return true for valid connection with edges', () => {