fix jest types by import @jest/globals

packages/file-graph/tests/file.test.ts

@@ -1,4 +1,5 @@
-import File from '../src/file'
+import { describe, test, expect } from '@jest/globals'
+import File from '../src/file.js'
 
 describe('File', () => {
   let file: File

packages/file-graph/tests/fileGraph.test.ts

@@ -1,3 +1,4 @@
+import { describe, test, expect } from '@jest/globals'
 import FileGraph from '../src/fileGraph.js'
 import FileNode from '../src/fileNode.js'
 

packages/file-graph/tests/fileNode.test.ts

@@ -1,3 +1,4 @@
+import { describe, test, expect } from '@jest/globals'
 import { DuplicateItemError, ParentNotExistsError } from '../src/errors.js'
 import FileNode from '../src/fileNode.js'
 import { FileObject } from '../src/file.js'