test ✅: add comprehensive test suite for CSS ordering rules

Add tests for all three CSS property ordering rules:

    alphabetical-order,
    concentric-order,
    custom-order,

Tests cover all implemented vanilla-extract APIs, fontFace, globalFontFace, globalKeyframes, globalStyle, keyframes, style, and styleVariants.. Each test verifies both valid and invalid cases, along with proper auto-fixing functionality.

src/css-rules/concentric-order/__tests__/global.test.ts

@@ -0,0 +1,58 @@
+import tsParser from '@typescript-eslint/parser';
+import { run } from 'eslint-vitest-rule-tester';
+import concentricOrderRule from '../rule-definition.js';
+
+run({
+  name: 'vanilla-extract/concentric-order/global',
+  rule: concentricOrderRule,
+  languageOptions: {
+    parser: tsParser,
+    parserOptions: {
+      ecmaVersion: 2022,
+      sourceType: 'module',
+    },
+  },
+  valid: [
+    // globalStyle with concentric ordering
+    `
+      import { globalStyle } from '@vanilla-extract/css';
+      
+      globalStyle('body', {
+        position: 'relative',
+        display: 'block',
+        margin: 0,
+        backgroundColor: 'white',
+        padding: 0,
+        color: 'black'
+      });
+    `,
+  ],
+  invalid: [
+    // globalStyle with incorrect ordering
+    {
+      code: `
+        import { globalStyle } from '@vanilla-extract/css';
+        globalStyle('body', {
+          color: 'black',
+          margin: 0,
+          backgroundColor: 'white',
+          padding: 0,
+          display: 'block',
+          position: 'relative'
+        });
+      `,
+      errors: [{ messageId: 'incorrectOrder' }],
+      output: `
+        import { globalStyle } from '@vanilla-extract/css';
+        globalStyle('body', {
+          position: 'relative',
+          display: 'block',
+          margin: 0,
+          backgroundColor: 'white',
+          padding: 0,
+          color: 'black'
+        });
+      `,
+    },
+  ],
+});