chore(GH-483): Upgrade npm tooling and group Dependabot updates

.github/dependabot.yml

@@ -3,12 +3,48 @@ updates:
 - package-ecosystem: composer
   directory: "/"
   schedule:
-    interval: daily
+    interval: weekly
+    day: monday
     time: "03:00"
   open-pull-requests-limit: 10
+  groups:
+    # One PR for Drupal core packages, which must move together.
+    drupal-core:
+      patterns:
+        - "drupal/core*"
+    # Contrib modules, drush and dev tooling: minor and patch in one PR.
+    # Majors still get their own PR each, because they need a manual look.
+    composer-minor-patch:
+      update-types:
+        - minor
+        - patch
 - package-ecosystem: npm
   directory: "/"
   schedule:
-    interval: daily
+    interval: weekly
+    day: monday
     time: "03:00"
   open-pull-requests-limit: 10
+  groups:
+    npm-minor-patch:
+      update-types:
+        - minor
+        - patch
+    # Lint stack majors usually need config changes together.
+    lint-major:
+      update-types:
+        - major
+      patterns:
+        - "eslint*"
+        - "@eslint/*"
+        - "prettier"
+        - "stylelint*"
+        - "globals"
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: monthly
+  groups:
+    github-actions:
+      patterns:
+        - "*"

.stylelintrc.json

@@ -1,26 +1,23 @@
 {
   "extends": [
-    "stylelint-config-standard",
-    "stylelint-config-prettier"
+    "stylelint-config-standard"
+  ],
+  "plugins": [
+    "stylelint-prettier"
   ],
-  "plugins": ["stylelint-prettier"],
   "rules": {
-    "at-rule-no-unknown": [ true, {
-      "ignoreAtRules": [
-        "include",
-        "mixin",
-        "extend",
-        "if",
-        "else",
-        "each",
-        "content",
-        "import",
-        "function",
-        "return"
-      ]
-    }],
     "no-descending-specificity": null,
-    "function-calc-no-invalid": null,
+    "selector-class-pattern": null,
     "prettier/prettier": true
-  }
-}
+  },
+  "overrides": [
+    {
+      "files": [
+        "**/*.scss"
+      ],
+      "extends": [
+        "stylelint-config-standard-scss"
+      ]
+    }
+  ]
+}

eslint.config.js

@@ -0,0 +1,48 @@
+import js from '@eslint/js';
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
+import globals from 'globals';
+
+export default [
+  {
+    ignores: [
+      '**/node_modules/',
+      '**/dist/',
+      '**/storybook-static/',
+      '**/*.min.js',
+      '**/*.bundle.js',
+    ],
+  },
+  js.configs.recommended,
+  {
+    // Parse as modules with JSX so themes' Storybook stories and Vite entries
+    // work. Drupal behaviors in IIFEs parse fine as modules too.
+    files: ['web/modules/custom/**/*.js', 'web/themes/custom/**/*.js'],
+    languageOptions: {
+      sourceType: 'module',
+      parserOptions: {
+        ecmaFeatures: { jsx: true },
+      },
+      globals: {
+        ...globals.browser,
+        Drupal: 'readonly',
+        drupalSettings: 'readonly',
+        once: 'readonly',
+        jQuery: 'readonly',
+      },
+    },
+  },
+  {
+    // Build tool config files run in Node.
+    files: ['**/*.config.js', '**/webpack/**/*.js', '**/.storybook/**/*.js'],
+    languageOptions: {
+      globals: globals.node,
+    },
+  },
+  {
+    files: ['**/*.test.js'],
+    languageOptions: {
+      globals: globals.jest,
+    },
+  },
+  eslintPluginPrettierRecommended,
+];