See #9686
```
❯ uv run python -c "import uv; uv.build_sdist"
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Users/zb/workspace/uv/python/uv/__init__.py", line 45, in __getattr__
raise AttributeError(err)
AttributeError: Using `uv.build_sdist` is not allowed. The uv build backend requires preview mode to be
enabled, e.g., via the `UV_PREVIEW=1` environment variable.
❯ uv run python -c "import uv; uv.foo"
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Users/zb/workspace/uv/python/uv/__init__.py", line 48, in __getattr__
raise AttributeError(err)
AttributeError: module 'uv' has no attribute 'foo'
❯ uv run python -c "import uv; uv.find_uv_bin"
```
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## Summary
[ruff's `find_bin`
implementation](19cd9d7d8a/python/ruff/__main__.py (L31))
can find the binary in relative to the package root. It'd be nice to
have the same functionality for `uv`.
First, replace all usages in files in-place. I used my editor for this.
If someone wants to add a one-liner that'd be fun.
Then, update directory and file names:
```
# Run twice for nested directories
find . -type d -print0 | xargs -0 rename s/puffin/uv/g
find . -type d -print0 | xargs -0 rename s/puffin/uv/g
# Update files
find . -type f -print0 | xargs -0 rename s/puffin/uv/g
```
Then add all the files again
```
# Add all the files again
git add crates
git add python/uv
# This one needs a force-add
git add -f crates/uv-trampoline
```
