fix(test): add delay before cleanup on Windows to release file handles

Windows can hold file handles briefly after file operations complete, causing
EPERM errors when trying to delete the temp directory in afterEach.

- Add 100ms delay on Windows using node:timers/promises
- Ensures file handles are fully released before cleanup
- Fixes: EPERM: operation not permitted, rmdir in json.test.ts

Author: jdalton

test/unit/json.test.ts

@@ -16,6 +16,7 @@
 import { mkdtemp, readFile, writeFile } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { join } from 'node:path'
+import { setTimeout as sleep } from 'node:timers/promises'
 
 import { safeDelete } from '@socketsecurity/lib/fs'
 import { getEditableJsonClass } from '@socketsecurity/lib/json/edit'
@@ -766,6 +767,11 @@ describe('json', () => {
 
     afterEach(async () => {
       if (testDir) {
+        // On Windows, add a small delay to ensure file handles are released
+        // before attempting to delete the temp directory
+        if (process.platform === 'win32') {
+          await sleep(100)
+        }
         await safeDelete(testDir)
       }
     })