Support for Python 3.13

[desaxce]

Python 3.13 is out and requires numpy 2.1.0.

So pip install chainlit fails with a 3.13 python on step Collecting numpy<2.0,>=1.26 (from chainlit):

      [30/299] Compiling C++ object numpy/core/libnpymath.a.p/src_npymath_halffloat.cpp.o
      FAILED: numpy/core/libnpymath.a.p/src_npymath_halffloat.cpp.o
      c++ -Inumpy/core/libnpymath.a.p -Inumpy/core -I../numpy/core -Inumpy/core/include -I../numpy/core/include -I../numpy/core/src/npymath -I../numpy/core/src/common -I/Users/desaxce/miniconda3/envs/test-chainlit-3-13/include/python3.13 -I/private/var/folders/6p/174thhgd0q7cx2_pcrxs8gmh0000gn/T/pip-install-ryz42rz9/numpy_d194ba82b605457da433f9e234575608/.mesonpy-x6wv80ku/meson_cpu -fcolor-diagnostics -DNDEBUG -Wall -Winvalid-pch -std=c++17 -O3 -ftrapping-math -DNPY_HAVE_CLANG_FPSTRICT -DNPY_HAVE_NEON_VFPV4 -DNPY_HAVE_NEON_FP16 -DNPY_HAVE_NEON -DNPY_HAVE_ASIMD -MD -MQ numpy/core/libnpymath.a.p/src_npymath_halffloat.cpp.o -MF numpy/core/libnpymath.a.p/src_npymath_halffloat.cpp.o.d -o numpy/core/libnpymath.a.p/src_npymath_halffloat.cpp.o -c ../numpy/core/src/npymath/halffloat.cpp
      In file included from ../numpy/core/src/npymath/halffloat.cpp:12:
      In file included from ../numpy/core/src/common/common.hpp:8:
      ../numpy/core/src/common/utils.hpp:10:10: fatal error: 'type_traits' file not found
         10 | #include <type_traits>
            |          ^~~~~~~~~~~~~
      1 error generated.
      [31/299] Generating 'numpy/core/libloops_hyperbolic.dispatch.h_baseline.a.p/loops_utils.h'
      [32/299] Generating 'numpy/core/libloops_hyperbolic.dispatch.h_baseline.a.p/loops.h'
      [33/299] Compiling C object numpy/core/libnpymath.a.p/src_npymath_npy_math.c.o
      [34/299] Generating 'numpy/core/libloops_hyperbolic.dispatch.h_baseline.a.p/loops_hyperbolic.dispatch.c'
      [35/299] Compiling C object numpy/core/libnpymath.a.p/meson-generated_npy_math_complex.c.o
      [36/299] Generating 'numpy/core/libloops_logical.dispatch.h_baseline.a.p/loops.h'
      [37/299] Generating 'numpy/core/libloops_logical.dispatch.h_baseline.a.p/loops_utils.h'
      [38/299] Compiling C object numpy/core/_multiarray_tests.cpython-313-darwin.so.p/src_common_npy_hashtable.c.o
      [39/299] Compiling C object numpy/core/_multiarray_tests.cpython-313-darwin.so.p/src_common_npy_argparse.c.o
      [40/299] Compiling C object numpy/core/_multiarray_tests.cpython-313-darwin.so.p/src_common_mem_overlap.c.o
      [41/299] Compiling C object numpy/core/_multiarray_tests.cpython-313-darwin.so.p/meson-generated__multiarray_tests.c.o
      ninja: build stopped: subcommand failed.
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

[dokterbob]

Closing this in favour of #1430 where work & tracking is going on.