Wheel contains unnecessary .agents/**/*.md files #16194

First Check

• I added a very descriptive title here.
• I used the GitHub search to find a similar question and didn't find it.
• I searched the FastAPI documentation, with the integrated search.
• I already searched in Google "How to X in FastAPI" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answer.
• I already checked if it is not related to FastAPI but to Pydantic.
• I already checked if it is not related to FastAPI but to Swagger UI.
• I already checked if it is not related to FastAPI but to ReDoc.

Commit to Help

• I commit to help with one of those options 👆

Example Code

From CLI:
(URL from https://pypi.org/project/fastapi/#files)

$ wget https://files.pythonhosted.org/packages/cb/03/10388a42375ee7e4ac9b94eb2c5c569c8b5795e377e701c9ac3ad63de890/fastapi-0.141.1-py3-none-any.whl
$ unzip -l fastapi-0.141.1-py3-none-any.whl

### Description

Unnecessary files are included:

$ unzip -l fastapi-0.141.1-py3-none-any.whl | grep '.agents'
10111 2016-01-01 00:00 fastapi/.agents/skills/fastapi/SKILL.md
3268 2016-01-01 00:00 fastapi/.agents/skills/fastapi/references/dependencies.md
1527 2016-01-01 00:00 fastapi/.agents/skills/fastapi/references/other-tools.md
1583 2016-01-01 00:00 fastapi/.agents/skills/fastapi/references/path-operations.md
1844 2016-01-01 00:00 fastapi/.agents/skills/fastapi/references/pydantic.md
1856 2016-01-01 00:00 fastapi/.agents/skills/fastapi/references/responses.md
2581 2016-01-01 00:00 fastapi/.agents/skills/fastapi/references/streaming.md

### Operating System

Linux

### Operating System Details

_No response_

### FastAPI Version

0.141.1

### Pydantic Version

2.13.4

### Python Version

3.14.0

### Additional Context

I have a fix here:
https://github.com/fastapi/fastapi/commit/a40d99bcc77aa9fe68e5aa4d7f131d7ba30f3dca

No AI was used.