Prevent csv export injections (#14347)

**Small Security Issue:** CSV exports were vulnerable to formula
injection attacks when users entered values starting with =, +, -, or @.
(only happens if a logged-in user injects corrupted data)

Solution:
- Added ZWJ (Zero-Width Joiner) protection that prefixes dangerous
values with invisible Unicode character
- This is the best way to preserve original data while preventing Excel
from executing formulas
- Added import cleanup to restore original values when re-importing
 
Changes:
- New sanitizeValueForCSVExport() function for security
- Updated all CSV export paths to use both security + formatting
functions
- Added comprehensive tests covering attack vectors and international
characters
- Also added cursor rules for better code consistency

---------

Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>

packages/twenty-shared/src/utils/navigation/getAppPath.ts

@@ -1,30 +0,0 @@
-import qs from 'qs';
-import { generatePath, type PathParam } from 'react-router-dom';
-import { type AppPath } from '../../types';
-import { isDefined } from '../validation';
-
-export const getAppPath = <T extends AppPath>(
-  to: T,
-  params?: { [key in PathParam<T>]: string | null },
-  queryParams?: Record<string, any>,
-) => {
-  let path: string = to;
-
-  if (isDefined(params)) {
-    path = generatePath<T>(to, params);
-  }
-
-  if (isDefined(queryParams)) {
-    const filteredParams = Object.fromEntries(
-      Object.entries(queryParams).filter(([_, value]) => isDefined(value)),
-    );
-
-    const queryString = qs.stringify(filteredParams);
-
-    if (queryString !== '') {
-      path += `?${queryString}`;
-    }
-  }
-
-  return path;
-};