Use the pydantic maintained fork of httpx, httpx2

[s-sajid-ali]

httpx has not had a release since Dec 24. PydanticAI has taken stewardship of the project by forking it as httpx2 (with recent releases containing bug fixes and support for python 3.14): https://github.com/pydantic/httpx2

It should be a straightforward process to replace httpx in the templates with httpx2. Please let me know if this is acceptable and thanks for making this great tool!

[dbanty]

Yeah, I saw that and figured I'd wait until it got traction/adoption before swapping. I assume most people won't want both httpx and httpx2 in their dependencies.

We could make it a generator option or use optional deps if the ecosystem is split.

@johnthagen I'd love your input since you seem to generally know what's going on in the world of Python packages ☺️