[ketpatil77]

Fixes #190.

The source distribution omits tox.ini and both requirements files, preventing downstream packagers from using the project's test environments. Include those files together with .pylintrc, HISTORY.rst, and CONTRIBUTING.rst, which the lint/readme environments also reference. Add the required Upcoming history entry.

Validation on Windows / Python 3.11.9 / pytest 8.4.2:

• Original archive is missing all six files.
• Corrected archive contains all six with exact source bytes.
• Installed flaky from the extracted corrected archive.
• Normal example/doctest command: 14 passed, 2 skipped, 3 xfailed.
• Parallel example command: 13 passed, 2 skipped, 3 xfailed.
• Plugin unit tests with -p no:flaky: 48 passed.
• Forced-flaky option examples pass.
• git diff --check passes.

AI-assisted contribution using OpenAI Codex. Lint/readme environments and other Python versions were not run; this change supplies their inputs without changing plugin behavior.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}