chore: install eslint with rubensworks config, add eslint.config.js and tsconfig.eslint.json

Agent-Logs-Url: https://github.com/rdfjs/rdfxml-streaming-parser.js/sessions/46b14265-34c1-4bd0-b41d-2a2e1a911a1d

Co-authored-by: rubensworks <440384+rubensworks@users.noreply.github.com>

Author: Copilot

.eslintcache

@@ -0,0 +1,90 @@
+const config = require('@rubensworks/eslint-config');
+
+module.exports = config([
+  {
+    ignores: [
+      'node_modules',
+      'coverage',
+      '**/*.js',
+      '**/*.d.ts',
+      '**/*.js.map',
+      '**/*.yml',
+      '**/*.yaml',
+      '**/*.md',
+      'perf/**',
+    ],
+  },
+  {
+    files: [ '**/*.ts' ],
+    languageOptions: {
+      parserOptions: {
+        tsconfigRootDir: __dirname,
+        project: [ './tsconfig.eslint.json' ],
+      },
+    },
+  },
+  {
+    // Project-specific overrides for TypeScript files
+    files: [ '**/*.ts' ],
+    rules: {
+      // Project uses strictNullChecks: false, so this rule cannot be applied
+      'ts/prefer-nullish-coalescing': 'off',
+      // This is a Node.js library that legitimately imports Node.js built-in modules
+      'import/no-nodejs-modules': 'off',
+      // Allow UPPER_CASE for class properties (public API constants) and enum members
+      'ts/naming-convention': [
+        'error',
+        {
+          selector: 'default',
+          format: [ 'camelCase' ],
+          leadingUnderscore: 'forbid',
+          trailingUnderscore: 'forbid',
+        },
+        {
+          selector: 'import',
+          format: null,
+        },
+        {
+          selector: 'variable',
+          format: [ 'camelCase', 'UPPER_CASE' ],
+          leadingUnderscore: 'forbid',
+          trailingUnderscore: 'forbid',
+        },
+        {
+          selector: 'classProperty',
+          format: [ 'camelCase', 'UPPER_CASE' ],
+          leadingUnderscore: 'forbid',
+          trailingUnderscore: 'forbid',
+        },
+        {
+          selector: 'enumMember',
+          format: [ 'camelCase', 'UPPER_CASE' ],
+        },
+        {
+          selector: 'typeLike',
+          format: [ 'PascalCase' ],
+        },
+        {
+          selector: [ 'typeParameter' ],
+          format: [ 'PascalCase' ],
+          prefix: [ 'T' ],
+        },
+        {
+          selector: 'interface',
+          format: [ 'PascalCase' ],
+          custom: {
+            regex: '^I[A-Z]',
+            match: true,
+          },
+        },
+        {
+          // Allow leading underscore for Node.js Transform stream override methods
+          selector: 'method',
+          format: [ 'camelCase' ],
+          leadingUnderscore: 'allow',
+          trailingUnderscore: 'forbid',
+        },
+      ],
+    },
+  },
+]);

eslint.config.js

@@ -1,14 +1,12 @@
-import {SaxesParser} from "@rubensworks/saxes";
-import {RdfXmlParser} from "./RdfXmlParser";
+import type { SaxesParser } from '@rubensworks/saxes';
+import type { RdfXmlParser } from './RdfXmlParser';
 
 /**
  * An error that includes line and column in the error message.
  */
 export class ParseError extends Error {
-
   constructor(parser: RdfXmlParser, message: string) {
     const saxParser: SaxesParser = (<any>parser).saxParser;
     super(parser.trackPosition ? `Line ${saxParser.line} column ${saxParser.column + 1}: ${message}` : message);
   }
-
 }