feat(lint): add type-aware parsing and validate script

.github/workflows/build.yml

@@ -27,4 +27,6 @@ jobs:
 
       - run: npm run build
 
-      - run: npm run check-types
+      - run: npm run check:tsc
+
+      - run: npm run validate

.github/workflows/lint.yml

@@ -25,4 +25,4 @@ jobs:
 
       - run: npm ci
 
-      - run: npx biome ci
+      - run: npm run lint:ci

eslint.config.js

@@ -0,0 +1,44 @@
+import baselinePlugin from 'eslint-plugin-baseline-js';
+import yalhPlugin from 'eslint-plugin-yet-another-license-header';
+import tseslint from 'typescript-eslint';
+
+const defaultLicense = `
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+`;
+
+const licensePattern =
+  /^\/\*\n \* Copyright The OpenTelemetry Authors\n \* SPDX-License-Identifier: Apache-2\.0\n \*\/$/;
+
+export default [
+  {
+    files: ['packages/*/src/**/*.{js,ts,mjs}'],
+    ignores: ['**/*.test.ts', '**/*.spec.ts'],
+    languageOptions: {
+      parser: tseslint.parser,
+      // enables type-aware linting to detect instance method usage
+      parserOptions: {
+        projectService: true,
+      },
+    },
+    plugins: {
+      'baseline-js': baselinePlugin,
+      'yet-another-license-header': yalhPlugin,
+    },
+    rules: {
+      ...baselinePlugin.configs['recommended-ts']({
+        available: 'widely',
+        level: 'error',
+      }).rules,
+      'yet-another-license-header/header': [
+        'error',
+        {
+          header: defaultLicense,
+          allowedHeaderPatterns: [licensePattern],
+        },
+      ],
+    },
+  },
+];

eslint.dist.config.js

@@ -0,0 +1,23 @@
+import baselinePlugin from 'eslint-plugin-baseline-js';
+import baseConfig from './eslint.config.js';
+
+// Extends base config and adds compiled output checking
+export default [
+  ...baseConfig,
+  // Compiled output - catches non-baseline APIs from dependencies
+  {
+    files: ['packages/*/dist/**/*.js'],
+    ignores: ['**/*.d.ts'],
+    plugins: {
+      'baseline-js': baselinePlugin,
+    },
+    rules: {
+      'baseline-js/use-baseline': [
+        'error',
+        {
+          available: 'widely',
+        },
+      ],
+    },
+  },
+];