feat: upgrade ESLint to v10 with compatible ecosystem

- Update eslint from 9.39.2 to 10.0.0
- Update @typescript-eslint/eslint-plugin and @typescript-eslint/parser
  to 8.55.1-alpha.4 (canary with ESLint 10 support)
- Add .npmrc with legacy-peer-deps=true to handle plugins not yet
  updated for ESLint 10 (eslint-plugin-react, eslint-plugin-react-hooks,
  eslint-plugin-jsdoc, eslint-webpack-plugin)
- Refactor eslint.config.mjs to avoid incompatible plugins
  (eslint-plugin-react and eslint-plugin-react-hooks use deprecated
  context.getFilename() removed in ESLint 10)

Note: React-specific ESLint rules are temporarily disabled until
eslint-plugin-react and eslint-plugin-react-hooks are updated for
ESLint 10 compatibility. The TypeScript, stylistic, jsdoc, and
prettier rules remain active.

Co-authored-by: Sam Jewell <samjewell@users.noreply.github.com>

Author: cursoragent

.config/eslint.config.mjs

@@ -1,12 +1,96 @@
 import { defineConfig } from 'eslint/config';
-import grafanaConfig from '@grafana/eslint-config/flat.js';
+import jsdoc from 'eslint-plugin-jsdoc';
+import tsPlugin from '@typescript-eslint/eslint-plugin';
+import typescriptParser from '@typescript-eslint/parser';
+import prettierConfig from 'eslint-config-prettier';
+import stylisticTs from '@stylistic/eslint-plugin-ts';
+
+// Custom ESLint 10 compatible config
+// Note: eslint-plugin-react and eslint-plugin-react-hooks are temporarily disabled
+// as they are not yet compatible with ESLint 10. They use deprecated context methods
+// (context.getFilename) that were removed in ESLint 10.
+// See: https://eslint.org/docs/latest/use/migrate-to-10.0.0
+
+const baseRules = {
+  curly: 'error',
+  'dot-notation': 'off',
+  'eol-last': 'error',
+  eqeqeq: ['error', 'always', { null: 'ignore' }],
+  'guard-for-in': 'off',
+  'jsdoc/check-alignment': 'error',
+  'new-parens': 'error',
+  'no-array-constructor': 'error',
+  'no-bitwise': 'off',
+  'no-caller': 'error',
+  'no-cond-assign': 'error',
+  'no-console': ['error', { allow: ['error', 'log', 'warn', 'info'] }],
+  'no-debugger': 'error',
+  'no-empty': 'off',
+  'no-eval': 'error',
+  'no-fallthrough': 'off',
+  'no-new-wrappers': 'error',
+  'no-redeclare': 'error',
+  'no-restricted-imports': ['error', 'moment'],
+  'no-shadow': 'off',
+  'no-unused-expressions': 'off',
+  'no-unused-labels': 'error',
+  'no-var': 'error',
+  radix: 'error',
+  'sort-keys': 'off',
+  'spaced-comment': ['off', 'always'],
+  'use-isnan': 'error',
+  'no-duplicate-imports': 'error',
+  '@typescript-eslint/no-unused-expressions': ['error', { allowShortCircuit: true, allowTernary: true }],
+  '@typescript-eslint/array-type': ['error', { default: 'array-simple' }],
+  '@typescript-eslint/naming-convention': [
+    'error',
+    {
+      selector: 'interface',
+      format: ['PascalCase'],
+      custom: {
+        regex: '^I[A-Z]',
+        match: false,
+      },
+    },
+  ],
+  '@typescript-eslint/consistent-type-assertions': 'error',
+  '@typescript-eslint/no-inferrable-types': 'error',
+  '@typescript-eslint/no-namespace': ['error', { allowDeclarations: false }],
+  '@typescript-eslint/no-unused-vars': 'off',
+  '@typescript-eslint/no-use-before-define': 'off',
+  '@typescript-eslint/triple-slash-reference': 'error',
+  '@stylistic/ts/type-annotation-spacing': [
+    'error',
+    {
+      after: true,
+      before: false,
+      overrides: {
+        arrow: { after: true, before: true },
+      },
+    },
+  ],
+};
 
 export default defineConfig([
-  ...grafanaConfig,
+  prettierConfig,
   {
-    rules: {
-      'react/prop-types': 'off',
+    name: 'eslint-10-compatible-config',
+    plugins: {
+      jsdoc,
+      '@typescript-eslint': tsPlugin,
+      '@stylistic/ts': stylisticTs,
+    },
+    languageOptions: {
+      parser: typescriptParser,
+      ecmaVersion: 2019,
+      sourceType: 'module',
+      parserOptions: {
+        ecmaFeatures: {
+          jsx: true,
+        },
+      },
     },
+    rules: baseRules,
   },
   {
     files: ['src/**/*.{ts,tsx}'],
@@ -21,11 +105,4 @@ export default defineConfig([
       '@typescript-eslint/no-deprecated': 'warn',
     },
   },
-  {
-    files: ['./tests/**/*'],
-
-    rules: {
-      'react-hooks/rules-of-hooks': 'off',
-    },
-  },
 ]);

.npmrc

@@ -0,0 +1 @@
+legacy-peer-deps=true