Silence setuptools' metadata deprecation warnings without changing what
is installed.

- project.license as a TOML table is deprecated; PEP 639 takes the SPDX
  expression as a string (setuptools >= 77.0.0).
- License classifiers are deprecated alongside a license expression.
- The headers under include/ are installed as package data, but only the
  top-level "include" package was listed, so setuptools warned about each
  subdirectory. List the subpackages too.

--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@
 description = "NVIDIA cuDNN Frontend — Python and C++ Graph API with SOTA attention (SDPA / Flash Attention), MoE grouped GEMM fusions, and FP8/MXFP8 kernels for Hopper, Blackwell, and Rubin GPUs."
 readme = "README.md"
 requires-python = ">=3.10"
-license = {text = "Apache-2.0 AND MIT"}
+license = "Apache-2.0 AND MIT"
 keywords = [
     "cudnn",
     "cuda",
@@ -31,8 +31,6 @@
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
     "Intended Audience :: Science/Research",
-    "License :: OSI Approved :: Apache Software License",
-    "License :: OSI Approved :: MIT License",
     "Operating System :: POSIX :: Linux",
     "Operating System :: Microsoft :: Windows",
     "Programming Language :: C++",
@@ -136,7 +134,7 @@
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools]
-packages = {find = {where = ["python", "."], include = ["cudnn*", "include"], namespaces = true}}
+packages = {find = {where = ["python", "."], include = ["cudnn*", "include", "include.*"], namespaces = true}}
 package-dir = {"" = "python", "include" = "include"}
 include-package-data = true