Fix build and lint errors for Node 24 compatibility

- Changed imports in add-examples-to-dts.ts from .ts to .js extensions (required for Node's native TypeScript support)
- Fixed ESLint errors: added unicorn/no-process-exit to disabled rules, updated import-x/no-unassigned-import rule
- Removed index.test.ts from tsconfig.json include array to prevent TypeScript compilation errors with node:assert/strict
- Test file doesn't need to be included in declaration generation since it's only used by vitest

Co-authored-by: fregante <1402241+fregante@users.noreply.github.com>

Author: Copilot

add-examples-to-dts.ts

@@ -1,11 +1,11 @@
-/* eslint-disable n/prefer-global/process */
+/* eslint-disable n/prefer-global/process, unicorn/no-process-exit */
 import {readFileSync, writeFileSync} from 'node:fs';
 import {execSync} from 'node:child_process';
 // Import index.ts to populate the test data via side effect
-// eslint-disable-next-line import/no-unassigned-import, n/file-extension-in-import
-import './index.ts';
+// eslint-disable-next-line n/file-extension-in-import, import-x/no-unassigned-import
+import './index.js';
 // eslint-disable-next-line n/file-extension-in-import
-import {getTests} from './collector.ts';
+import {getTests} from './collector.js';
 
 // Read the generated .d.ts file
 const dtsPath = './distribution/index.d.ts';

tsconfig.json

@@ -8,7 +8,6 @@
 	},
 	"include": [
 		"index.ts",
-		"index.test.ts",
 		"global.d.ts",
 		"collector.ts"
 	]