chore: migrate charts and wc to flat configs (#35544)

Author: mainframev

change/@fluentui-chart-utilities-6be52925-6ad5-4fea-9a86-4bc5a67e22c6.json

@@ -0,0 +1,7 @@
+{
+  "type": "none",
+  "comment": "chore: migrate to eslint flat configs",
+  "packageName": "@fluentui/chart-utilities",
+  "email": "vgenaev@gmail.com",
+  "dependentChangeType": "none"
+}

change/@fluentui-chart-web-components-1ef9de06-a83e-44a2-8267-b7f26e433ee4.json

@@ -0,0 +1,7 @@
+{
+  "type": "none",
+  "comment": "chore: migrate to eslint flat configs",
+  "packageName": "@fluentui/chart-web-components",
+  "email": "vgenaev@gmail.com",
+  "dependentChangeType": "none"
+}

change/@fluentui-react-charting-394e15c8-155f-44ef-8034-659b65dfcc3d.json

@@ -0,0 +1,7 @@
+{
+  "type": "none",
+  "comment": "chore: migrate to eslint flat configs",
+  "packageName": "@fluentui/react-charting",
+  "email": "vgenaev@gmail.com",
+  "dependentChangeType": "none"
+}

change/@fluentui-react-charts-daeaf079-cd9e-4ab9-8cbe-00542c800751.json

@@ -0,0 +1,7 @@
+{
+  "type": "none",
+  "comment": "chore: migrate to eslint flat configs",
+  "packageName": "@fluentui/react-charts",
+  "email": "vgenaev@gmail.com",
+  "dependentChangeType": "none"
+}

change/@fluentui-web-components-7c3b2519-6827-41d0-baa4-126ea271eb5d.json

@@ -0,0 +1,7 @@
+{
+  "type": "none",
+  "comment": "chore: migrate to eslint flat configs",
+  "packageName": "@fluentui/web-components",
+  "email": "vgenaev@gmail.com",
+  "dependentChangeType": "none"
+}

packages/charts/chart-utilities/.eslintrc.json

@@ -0,0 +1,11 @@
+// @ts-check
+const fluentPlugin = require('@fluentui/eslint-plugin');
+
+/** @type {import("eslint").Linter.Config[]} */ module.exports = [
+  ...fluentPlugin.configs['flat/react-legacy'],
+  {
+    ruels: {
+      'no-restricted-globals': 'off',
+    },
+  },
+];

packages/charts/chart-utilities/eslint.config.js

@@ -0,0 +1,92 @@
+// @ts-check
+import tseslint from 'typescript-eslint';
+import importPlugin from 'eslint-plugin-import';
+import playwright from 'eslint-plugin-playwright';
+import eslintJs from '@eslint/js';
+
+/** @type {import("eslint").Linter.Config[]} */
+export default [
+  {
+    ignores: ['dist', 'coverage', '.storybook'],
+  },
+  eslintJs.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    plugins: {
+      import: importPlugin,
+      playwright: playwright,
+    },
+    languageOptions: {
+      parser: tseslint.parser,
+    },
+    settings: {
+      react: {
+        version: 'latest',
+      },
+    },
+    rules: {
+      'no-empty': [
+        'error',
+        {
+          allowEmptyCatch: true,
+        },
+      ],
+      'no-extra-boolean-cast': 'off',
+      'no-prototype-builtins': 'off',
+      'no-fallthrough': 'off',
+      'no-unexpected-multiline': 'off',
+      'no-useless-escape': 'off',
+      'import/order': 'error',
+      'sort-imports': [
+        'error',
+        {
+          ignoreCase: true,
+          ignoreDeclarationSort: true,
+        },
+      ],
+      'comma-dangle': 'off',
+      '@typescript-eslint/no-non-null-assertion': 'off',
+      '@typescript-eslint/no-use-before-define': 'off',
+      '@typescript-eslint/no-empty-interface': 'error',
+      '@typescript-eslint/no-empty-object-type': 'off',
+      '@typescript-eslint/no-unsafe-declaration-merging': 'off',
+      '@typescript-eslint/explicit-module-boundary-types': 'off',
+      '@typescript-eslint/explicit-function-return-type': 'off',
+      '@typescript-eslint/camelcase': 'off',
+      '@typescript-eslint/no-inferrable-types': 'off',
+      '@typescript-eslint/no-unused-vars': [
+        'warn',
+        {
+          args: 'none',
+        },
+      ],
+      '@typescript-eslint/no-unused-expressions': 'warn',
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/naming-convention': [
+        'error',
+        {
+          selector: 'default',
+          format: ['UPPER_CASE', 'camelCase', 'PascalCase'],
+          leadingUnderscore: 'allow',
+        },
+        {
+          selector: 'property',
+          format: null, // disable for property names because of our foo__expanded convention for JSS
+          // TODO: I think we can come up with a regex that ignores variables with __ in them
+        },
+        {
+          selector: 'variable',
+          format: null, // disable for variable names because of our foo__expanded convention for JSS
+          // TODO: I think we can come up with a regex that ignores variables with __ in them
+        },
+      ],
+      ...playwright.configs['flat/recommended'].rules,
+    },
+  },
+  {
+    files: ['scripts/**/*.js', 'scripts/**/*.cjs'],
+    rules: {
+      'no-undef': 'off',
+    },
+  },
+];