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

.gitattributes

@@ -0,0 +1,28 @@
+* text=auto eol=lf
+
+*.ts text eol=lf
+*.tsx text eol=lf
+*.js text eol=lf
+*.jsx text eol=lf
+*.json text eol=lf
+*.md text eol=lf
+*.yml text eol=lf
+*.yaml text eol=lf
+*.sh text eol=lf
+*.mjs text eol=lf
+*.cjs text eol=lf
+
+# Patch files may have mixed line endings by design
+*.patch -text
+
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.ico binary
+*.svg binary
+*.woff binary
+*.woff2 binary
+*.ttf binary
+*.eot binary
+

.prettierrc

@@ -1,5 +1,5 @@
 {
   "singleQuote": true,
   "trailingComma": "all",
-  "endOfLine": "auto"
+  "endOfLine": "lf"
 }

.vscode/settings.json

@@ -1,6 +1,8 @@
 {
   "editor.formatOnSave": false,
-  "files.eol": "auto",
+  "files.eol": "\n",
+  "files.insertFinalNewline": true,
+  "files.trimTrailingWhitespace": true,
   "[typescript]": {
     "editor.formatOnSave": false,
     "editor.codeActionsOnSave": {

packages/twenty-server/.prettierrc

@@ -1,5 +0,0 @@
-{
-  "singleQuote": true,
-  "trailingComma": "all",
-  "brakeBeforeElse": false
-}

packages/twenty-zapier/.prettierrc

@@ -1,4 +0,0 @@
-{
-  "singleQuote": true,
-  "trailingComma": "all"
-}

tools/eslint-rules/rules/component-props-naming.ts

@@ -3,7 +3,7 @@ import {
   isIdentifier,
   isVariableDeclarator,
 } from '@typescript-eslint/utils/ast-utils';
-import { RuleContext } from '@typescript-eslint/utils/ts-eslint';
+import { type RuleContext } from '@typescript-eslint/utils/ts-eslint';
 
 // NOTE: The rule will be available in ESLint configs as "@nx/workspace-component-props-naming"
 export const RULE_NAME = 'component-props-naming';

tools/eslint-rules/rules/effect-components.ts

@@ -1,9 +1,9 @@
-import { ESLintUtils, TSESTree } from '@typescript-eslint/utils';
+import { ESLintUtils, type TSESTree } from '@typescript-eslint/utils';
 import {
   isIdentifier,
   isVariableDeclarator,
 } from '@typescript-eslint/utils/ast-utils';
-import { RuleContext } from '@typescript-eslint/utils/ts-eslint';
+import { type RuleContext } from '@typescript-eslint/utils/ts-eslint';
 
 // NOTE: The rule will be available in ESLint configs as "@nx/workspace-effect-components"
 export const RULE_NAME = 'effect-components';

tools/eslint-rules/rules/explicit-boolean-predicates-in-if.ts

@@ -1,4 +1,4 @@
-import { ESLintUtils, TSESTree } from '@typescript-eslint/utils';
+import { ESLintUtils, type TSESTree } from '@typescript-eslint/utils';
 import ts from 'typescript';
 
 export const RULE_NAME = 'explicit-boolean-predicates-in-if';

tools/eslint-rules/rules/matching-state-variable.ts

@@ -1,7 +1,7 @@
 import {
   AST_NODE_TYPES,
   ESLintUtils,
-  TSESTree,
+  type TSESTree,
 } from '@typescript-eslint/utils';
 import { isIdentifier } from '@typescript-eslint/utils/ast-utils';
 

tools/eslint-rules/rules/max-consts-per-file.ts

@@ -1,4 +1,4 @@
-import { ESLintUtils, TSESTree } from '@typescript-eslint/utils';
+import { ESLintUtils, type TSESTree } from '@typescript-eslint/utils';
 
 // NOTE: The rule will be available in ESLint configs as "@nx/workspace-max-consts-per-file"
 export const RULE_NAME = 'max-consts-per-file';

tools/eslint-rules/rules/no-navigate-prefer-link.ts

@@ -1,4 +1,4 @@
-import { ESLintUtils, TSESTree } from '@typescript-eslint/utils';
+import { ESLintUtils, type TSESTree } from '@typescript-eslint/utils';
 
 // NOTE: The rule will be available in ESLint configs as "@nx/workspace-no-navigate-prefer-link"
 export const RULE_NAME = 'no-navigate-prefer-link';

tools/eslint-rules/rules/sort-css-properties-alphabetically.ts

@@ -1,9 +1,9 @@
 import { ESLintUtils, TSESTree } from '@typescript-eslint/utils';
 import { isIdentifier } from '@typescript-eslint/utils/ast-utils';
 import {
-  RuleFix,
-  RuleFixer,
-  SourceCode,
+  type RuleFix,
+  type RuleFixer,
+  type SourceCode,
 } from '@typescript-eslint/utils/ts-eslint';
 
 import postcss from 'postcss';