Windows contributors face multiple issues: symlink folders not portable, permission errors, and missing imports in tests

**Summary**

Trying to contribute as a Windows developer to this repo turned up several significant issues:

1. Several folders (e.g., `kubernetes/config`, `kubernetes/watch`) are symlinks to `base/` subdirectories in the repo. On Windows _and_ when using ZIP downloads from GitHub, these appear as plain text files and break both `pip install -e .` and running tests, since setuptools expects actual directories.

2. At least one test file (`watch_test.py` under `kubernetes/base/watch` and duplicated under `kubernetes/watch`) is missing `import json`. This causes test failures with `NameError: name 'json' is not defined`.

3. Several tests (for example, `test_oidc_with_refresh` inside `kube_config_test.py`) fail on Windows with `PermissionError` when trying to create/write temp files.

**Steps to Reproduce**

- Clone or download the repo on Windows.
- Try `pip install -e .` or run `python -m pytest`.
- Observe errors related to config/watch packages not being directories, import errors in test files, and permission errors for temp files.

**Proposed Fixes**

- Replace symlinks (`kubernetes/config`, `kubernetes/watch`, etc.) with real directories or use another structure to support Windows and ZIP-based contributors.
- Ensure all test modules have necessary imports (e.g., `import json`).
- Refactor or skip the failing temp file tests on Windows, or improve documentation about required permissions.

**Environment**

- OS: Windows 10/11, Python 3.13
- (Include `pip list` or `pip freeze` if desired)

**Thank you! I’m happy to give more details or to help test solutions.**

Start by reproducing the reported failures on Windows with `pip install -e .` and `python -m pytest`. Inspect the symlinked `kubernetes/config` and `kubernetes/watch` paths, `kubernetes/base/watch/watch_test.py`, its duplicate, and `kube_config_test.py`, focusing on the missing `json` import and `test_oidc_with_refresh`. Done means installation and the affected tests work on Windows and ZIP-based checkouts.

Written by the indexing model from the issue text.