Consolidate Prettier config and improve consistency (#15191)

## Summary

Clean up and consolidate formatting configuration across the monorepo.

## Changes

### 1. Remove Redundant Configs
- ❌ Delete `packages/twenty-server/.prettierrc` (had invalid
`brakeBeforeElse` typo)
- ❌ Delete `packages/twenty-zapier/.prettierrc`
- ✅ Use root `.prettierrc` only (Prettier searches up directory tree
automatically)

### 2. Improve Root Prettier Config
- Change `endOfLine: 'auto'` → `'lf'` for consistent Unix line endings
across all OSes

### 3. Enhance VSCode Settings
- `files.eol: 'auto'` → `'\\n'` (consistent with Prettier)
- Add `files.insertFinalNewline: true` (explicit editor behavior)
- Add `files.trimTrailingWhitespace: true` (cleaner files)

### 4. Add `.gitattributes`
- Enforce LF line endings at Git level
- Prevents `core.autocrlf` from converting based on contributor's OS
- Mark patch files as binary (they have mixed line endings by design)
- Explicitly define binary file types

### 5. Fix Line Endings
- Convert 3 selectable-list state files from CRLF → LF
- These were the only source files with Windows line endings

## Why These Changes Matter

**Before:**
- 3 different Prettier configs (inconsistent, one had typo)
- Mixed CRLF/LF depending on contributor's OS
- No Git-level enforcement

**After:**
- Single source of truth for formatting
- All files use LF (Unix standard)
- Git enforces line endings regardless of OS
- Prettier warning about invalid option removed

## Result

- ✅ Single `.prettierrc` config
- ✅ Consistent LF line endings enforced by Git
- ✅ Better VSCode defaults
- ✅ No more CRLF files sneaking in from Windows contributors

packages/twenty-front/src/modules/ui/layout/selectable-list/states/isSelectedItemIdComponentFamilyState.ts

@@ -1,11 +1,11 @@
-import { SelectableListComponentInstanceContext } from '@/ui/layout/selectable-list/states/contexts/SelectableListComponentInstanceContext';
-import { createComponentFamilyState } from '@/ui/utilities/state/component-state/utils/createComponentFamilyState';
-
-export const isSelectedItemIdComponentFamilyState = createComponentFamilyState<
-  boolean,
-  string
->({
-  key: 'isSelectedItemIdComponentFamilyState',
-  defaultValue: false,
-  componentInstanceContext: SelectableListComponentInstanceContext,
-});
+import { SelectableListComponentInstanceContext } from '@/ui/layout/selectable-list/states/contexts/SelectableListComponentInstanceContext';
+import { createComponentFamilyState } from '@/ui/utilities/state/component-state/utils/createComponentFamilyState';
+
+export const isSelectedItemIdComponentFamilyState = createComponentFamilyState<
+  boolean,
+  string
+>({
+  key: 'isSelectedItemIdComponentFamilyState',
+  defaultValue: false,
+  componentInstanceContext: SelectableListComponentInstanceContext,
+});

packages/twenty-front/src/modules/ui/layout/selectable-list/states/selectableItemIdsComponentState.ts

@@ -1,10 +1,10 @@
-import { SelectableListComponentInstanceContext } from '@/ui/layout/selectable-list/states/contexts/SelectableListComponentInstanceContext';
-import { createComponentState } from '@/ui/utilities/state/component-state/utils/createComponentState';
-
-export const selectableItemIdsComponentState = createComponentState<string[][]>(
-  {
-    key: 'selectableItemIdsComponentState',
-    defaultValue: [[]],
-    componentInstanceContext: SelectableListComponentInstanceContext,
-  },
-);
+import { SelectableListComponentInstanceContext } from '@/ui/layout/selectable-list/states/contexts/SelectableListComponentInstanceContext';
+import { createComponentState } from '@/ui/utilities/state/component-state/utils/createComponentState';
+
+export const selectableItemIdsComponentState = createComponentState<string[][]>(
+  {
+    key: 'selectableItemIdsComponentState',
+    defaultValue: [[]],
+    componentInstanceContext: SelectableListComponentInstanceContext,
+  },
+);

packages/twenty-front/src/modules/ui/layout/selectable-list/states/selectedItemIdComponentState.ts

@@ -1,10 +1,10 @@
-import { SelectableListComponentInstanceContext } from '@/ui/layout/selectable-list/states/contexts/SelectableListComponentInstanceContext';
-import { createComponentState } from '@/ui/utilities/state/component-state/utils/createComponentState';
-
-export const selectedItemIdComponentState = createComponentState<string | null>(
-  {
-    key: 'selectedItemIdComponentState',
-    defaultValue: null,
-    componentInstanceContext: SelectableListComponentInstanceContext,
-  },
-);
+import { SelectableListComponentInstanceContext } from '@/ui/layout/selectable-list/states/contexts/SelectableListComponentInstanceContext';
+import { createComponentState } from '@/ui/utilities/state/component-state/utils/createComponentState';
+
+export const selectedItemIdComponentState = createComponentState<string | null>(
+  {
+    key: 'selectedItemIdComponentState',
+    defaultValue: null,
+    componentInstanceContext: SelectableListComponentInstanceContext,
+  },
+);