fix: Add ESLint config and fix linting errors

- Add .eslintrc.js with TypeScript rules
- Fix unused variable errors in NodeQuery.ts
- Remove unused imports from TraversalQuery.ts
- All tests passing (294 tests)
- Linter now passes with only warnings (29 warnings, 0 errors)

Author: michaeloboyle

.eslintrc.js

@@ -0,0 +1,15 @@
+module.exports = {
+  parser: '@typescript-eslint/parser',
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+  ],
+  parserOptions: {
+    ecmaVersion: 2020,
+    sourceType: 'module',
+  },
+  rules: {
+    '@typescript-eslint/no-explicit-any': 'warn',
+    '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
+  },
+};

src/query/NodeQuery.ts

@@ -379,7 +379,7 @@ export class NodeQuery {
     // Add WHERE conditions
     const conditions: string[] = [`n.type = ?`];
 
-    for (const [key, _value] of this.whereConditions) {
+    for (const [key] of this.whereConditions) {
       conditions.push(`json_extract(n.properties, '$.${key}') = ?`);
     }
 
@@ -424,7 +424,7 @@ export class NodeQuery {
     params.push(this.nodeType);
 
     // Add WHERE condition values
-    for (const [_key, value] of this.whereConditions) {
+    for (const [, value] of this.whereConditions) {
       params.push(value);
     }
 

src/query/TraversalQuery.ts

@@ -1,5 +1,5 @@
 import Database from 'better-sqlite3';
-import { Node, NodeData, TraversalDirection, TraversalStep } from '../types';
+import { Node, TraversalStep } from '../types';
 import { deserialize, timestampToDate } from '../utils/serialization';
 
 /**