[Bug Report] .flake8 Not found when Create Project

[LiuXianBang]

Describe the bug

When I use isaaclab.bat --new to Create my project

some Error occurred

Traceback (most recent call last):
  File "D:\Project\IsaacLab\tools\template\cli.py", line 262, in <module>
    main()
  File "D:\Project\IsaacLab\tools\template\cli.py", line 258, in main
    generate(specification)
  File "D:\Project\IsaacLab\tools\template\generator.py", line 315, in generate
    _external(specification)
  File "D:\Project\IsaacLab\tools\template\generator.py", line 164, in _external
    shutil.copyfile(os.path.join(ROOT_DIR, ".flake8"), os.path.join(project_dir, ".flake8"))
  File "C:\Users\l3820\.conda\envs\env_isaaclab\Lib\shutil.py", line 256, in copyfile
    with open(src, 'rb') as fsrc:
         ^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'D:\\Project\\IsaacLab\\.flake8'

I am certain that this bug is the latest occurrence, so I checked the version records on GitHub and found that. flake8 has been deleted in the past day, which may be the root cause of this issue.
#4335