python3Packages.curl-cffi: add missing rich dependency

otherwise `$out/bin/curl-cffi` fails:
> Traceback (most recent call last):
>   File "/nix/store/jdi22r7swyiml492lms3ril9b45phmf9-python3.13-curl-cffi-0.15.0/bin/.curl-cffi-wrapped", line 6, in <module>
>     from curl_cffi.cli import main
>   File "/nix/store/jdi22r7swyiml492lms3ril9b45phmf9-python3.13-curl-cffi-0.15.0/lib/python3.13/site-packages/curl_cffi/cli/__init__.py", line 6, in <module>
>     from .run import handle_run, parse_http_file  # noqa: F401
>     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>   File "/nix/store/jdi22r7swyiml492lms3ril9b45phmf9-python3.13-curl-cffi-0.15.0/lib/python3.13/site-packages/curl_cffi/cli/run.py", line 11, in <module>
>     from .request import _execute_request
>   File "/nix/store/jdi22r7swyiml492lms3ril9b45phmf9-python3.13-curl-cffi-0.15.0/lib/python3.13/site-packages/curl_cffi/cli/request.py", line 12, in <module>
>     from .output import determine_print_spec, handle_download, print_output
>   File "/nix/store/jdi22r7swyiml492lms3ril9b45phmf9-python3.13-curl-cffi-0.15.0/lib/python3.13/site-packages/curl_cffi/cli/output.py", line 12, in <module>
>     from rich.console import Console
> ModuleNotFoundError: No module named 'rich'

`rich` was being propagated by `litestar` -- added to
`nativeCheckInputs` in 4985af20df. build with `doCheck = false` and
it's clear that upstream wants `rich` at runtime:

> Running phase: pythonRuntimeDepsCheckHook
> Executing pythonRuntimeDepsCheck
> Checking runtime dependencies for curl_cffi-0.15.0-cp310-abi3-linux_aarch64.whl
>   - rich not installed

pkgs/development/python-modules/curl-cffi/default.nix

@@ -17,6 +17,7 @@
   pytest-trio,
   pytestCheckHook,
   python-multipart,
+  rich,
   trustme,
   uvicorn,
   websockets,
@@ -46,6 +47,7 @@ buildPythonPackage rec {
   dependencies = [
     cffi
     certifi
+    rich
   ];
 
   pythonImportsCheck = [ "curl_cffi" ];