Fix Python packaging edge cases (#17159)

Signed-off-by: Christian Heimes <christian@python.org>

.gitignore

@@ -3,6 +3,7 @@
 
 # vllm-flash-attn built from source
 vllm/vllm_flash_attn/*
+!vllm/vllm_flash_attn/__init__.py
 !vllm/vllm_flash_attn/fa_utils.py
 
 # Byte-compiled / optimized / DLL files

pyproject.toml

@@ -46,8 +46,7 @@ vllm = "vllm.entrypoints.cli.main:main"
 
 [tool.setuptools.packages.find]
 where = ["."]
-exclude = ["benchmarks", "csrc", "docs", "examples", "tests*"]
-namespaces = false
+include = ["vllm*"]
 
 [tool.yapfignore]
 ignore_patterns = [