Fix missing dotenv for requirements.in

[zackees]

Request for upstream merge.

My front end tool aicode is reporting that this is a missing dependency when it launches aider.chat in an isolated environment.

I fixed it on my end by forcing dotenv to be included.

[zackees]

let's merge this. easy but critical fix.

[paul-gauthier]

Thanks for your interest in aider and for taking the time to make this PR.

What is the problem you are trying to solve?

I see python-dotenv is being correctly included as a dependency.

$ grep dotenv requirements.txt
python-dotenv==1.0.1

[zackees]

The problem is that the installation is missing the dotenv dependency, and will crash on windows when installed into an isolated environment (in this case my tool aicode, which uses an isolated venv environment (not pipx, uv).

I can also see that it's missing right here in the *.in file here.

It may be transitively pulled in via a sub dependency for certain platforms. I'm not sure why you are seeing it and I'm not.

However, include what you use is not a bad choice in this case.