Support for free-threaded Python

Chưa có ai nhận issue này.

Installing from source on Python 3.13 (M1 Mac) works fine:

```
$ python -VV
Python 3.13.0 (main, Oct 16 2024, 08:05:40) [Clang 18.1.8 ]
$ uv pip install "httptools==0.6.4" --no-binary :all:
Resolved 1 package in 1.31s
Built httptools==0.6.4
Prepared 1 package in 5.47s
Installed 1 package in 8ms
+ httptools==0.6.4
```

But in free-threaded Python:

```
$ python -VV
Python 3.13.0 experimental free-threading build (main, Oct 16 2024, 08:24:33) [Clang 18.1.8 ]
$ uv pip install "httptools==0.6.4" --no-binary :all:
Resolved 1 package in 1.14s
error: Failed to prepare distributions
Caused by: Failed to download and build `httptools==0.6.4`
Caused by: Build backend failed to build wheel through `build_wheel` (exit status: 1)

[stdout]
running bdist_wheel
running build
running build_py
copying httptools/_version.py -> build/lib.macosx-11.0-arm64-cpython-313t/httptools
copying httptools/__init__.py -> build/lib.macosx-11.0-arm64-cpython-313t/httptools
copying httptools/parser/__init__.py -> build/lib.macosx-11.0-arm64-cpython-313t/httptools/parser
copying httptools/parser/errors.py -> build/lib.macosx-11.0-arm64-cpython-313t/httptools/parser
running egg_info
writing httptools.egg-info/PKG-INFO
writing dependency_links to httptools.egg-info/dependency_links.txt
writing requirements to httptools.egg-info/requires.txt
writing top-level names to httptools.egg-info/top_level.txt
reading manifest file 'httptools.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
adding license file 'LICENSE'
writing manifest file 'httptools.egg-info/SOURCES.txt'
copying httptools/parser/cparser.pxd -> build/lib.macosx-11.0-arm64-cpython-313t/httptools/parser
copying httptools/parser/parser.pyx -> build/lib.macosx-11.0-arm64-cpython-313t/httptools/parser
copying httptools/parser/python.pxd -> build/lib.macosx-11.0-arm64-cpython-313t/httptools/parser
copying httptools/parser/url_cparser.pxd -> build/lib.macosx-11.0-arm64-cpython-313t/httptools/parser
copying httptools/parser/url_parser.pyx -> build/lib.macosx-11.0-arm64-cpython-313t/httptools/parser
running build_ext
building 'httptools.parser.parser' extension
clang -fno-strict-overflow -Wsign-compare -Wunreachable-code -DNDEBUG -g -O3 -Wall -arch arm64 -mmacosx-version-min=11.0 -Wno-nullability-completeness -Wno-expansion-to-defined -Wno-undef-prefix -fPIC -Werror=unguarded-availability-new -I/Users/juan_cano/.cache/uv/sdists-v5/index/d2e01f6a682f0b5c/httptools/0.6.4/uI2NjLIM8YFjwSjCP_QiN/httptools-0.6.4.tar.gz/vendor/llhttp/include -I/Users/juan_cano/.cache/uv/sdists-v5/index/d2e01f6a682f0b5c/httptools/0.6.4/uI2NjLIM8YFjwSjCP_QiN/httptools-0.6.4.tar.gz/vendor/llhttp/src -I/Users/juan_cano/.cache/uv/builds-v0/.tmpAVsfvs/include -I/Users/juan_cano/.local/share/uv/python/cpython-3.13.0+freethreaded-macos-aarch64-none/include/python3.13t -c httptools/parser/parser.c -o build/temp.macosx-11.0-arm64-cpython-313t/httptools/parser/parser.o -O2

[stderr]
/Users/juan_cano/.cache/uv/builds-v0/.tmpAVsfvs/lib/python3.13t/site-packages/setuptools/_distutils/dist.py:261: UserWarning: Unknown distribution option: 'test_suite'
warnings.warn(msg)
httptools/parser/parser.c:2189:80: error: unknown type name '__pyx_vectorcallfunc'; did you mean 'vectorcallfunc'?
2189 | static CYTHON_INLINE PyObject *__Pyx_PyVectorcall_FastCallDict(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw);
| ^~~~~~~~~~~~~~~~~~~~
| vectorcallfunc
/Users/juan_cano/.local/share/uv/python/cpython-3.13.0+freethreaded-macos-aarch64-none/include/python3.13t/object.h:495:21: note: 'vectorcallfunc' declared here
495 | typedef PyObject *(*vectorcallfunc)(PyObject *callable, PyObject *const *args,
| ^
httptools/parser/parser.c:14183:69: error: unknown type name '__pyx_vectorcallfunc'; did you mean 'vectorcallfunc'?
14183 | static PyObject *__Pyx_PyVectorcall_FastCallDict_kw(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
| ^~~~~~~~~~~~~~~~~~~~
| vectorcallfunc
/Users/juan_cano/.local/share/uv/python/cpython-3.13.0+freethreaded-macos-aarch64-none/include/python3.13t/object.h:495:21: note: 'vectorcallfunc' declared here
495 | typedef PyObject *(*vectorcallfunc)(PyObject *callable, PyObject *const *args,
| ^
httptools/parser/parser.c:14228:80: error: unknown type name '__pyx_vectorcallfunc'; did you mean 'vectorcallfunc'?
14228 | static CYTHON_INLINE PyObject *__Pyx_PyVectorcall_FastCallDict(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
| ^~~~~~~~~~~~~~~~~~~~
| vectorcallfunc
/Users/juan_cano/.local/share/uv/python/cpython-3.13.0+freethreaded-macos-aarch64-none/include/python3.13t/object.h:495:21: note: 'vectorcallfunc' declared here
495 | typedef PyObject *(*vectorcallfunc)(PyObject *callable, PyObject *const *args,
| ^
httptools/parser/parser.c:14917:6: error: unknown type name '__pyx_vectorcallfunc'; did you mean 'vectorcallfunc'?
14917 | __pyx_vectorcallfunc vc = __Pyx_CyFunction_func_vectorcall(cyfunc);
| ^~~~~~~~~~~~~~~~~~~~
| vectorcallfunc
/Users/juan_cano/.local/share/uv/python/cpython-3.13.0+freethreaded-macos-aarch64-none/include/python3.13t/object.h:495:21: note: 'vectorcallfunc' declared here
495 | typedef PyObject *(*vectorcallfunc)(PyObject *callable, PyObject *const *args,
| ^
4 errors generated.
error: command '/usr/bin/clang' failed with exit code 1
```

Bắt đầu với httptools/parser/parser.pyx, httptools/parser/url_parser.pyx và httptools/parser/parser.c được tạo tự động, sau đó kiểm tra cách extension được tạo và build cho Python 3.13t. Tái hiện lệnh cài đặt từ mã nguồn bằng bản build Python free-threaded; được xem là hoàn thành khi httptools build và cài đặt thành công mà không có các lỗi biên dịch đã báo cáo.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.