Vendor replicate-python and ship to PyPI

[simonw]

My attempt to ship this failed. I think I need to vendor the replicate-python library.

[simonw]

The main change I had to make to the Replicate library was removing the bit that tried to look up its own version: https://github.com/replicate/replicate-python/blob/main/replicate/__about__.py

Plus I applied my own fix: simonw/replicate-python@8715c38

Hoping they merge my PR soon so I can un-vendor it again:

• Work with both Pydantic 1 and 2 replicate/replicate-python#121

[simonw]

Shipped: https://pypi.org/project/llm-replicate/