pyembed macos compile error init_fs_encoding

Nobody has claimed this yet.

I am using macos and venv. I am trying to run python code with pyembed. I tried setting filesystem_encoding and the python path to the python from the venv

I took this from the bench and it works. I think the default should be updated to work out of the box.

```
config.interpreter_config.parse_argv = Some(false);
config.set_missing_path_configuration = false;
config.argv = Some(vec!["python".into()]);
config.interpreter_config.executable = Some("python".into());
```
```
Python path configuration:
PYTHONHOME = '/Users/user/code/rust/test/target/debug'
PYTHONPATH = (not set)
program name = '/Users/user/code/rust/test/target/debug/test'
isolated = 0
environment = 1
user site = 1
import site = 1
sys._base_executable = '/Users/user/code/rust/test target/debug/test'
sys.base_prefix = '/Users/frederik/code/rust/manga-image-translator/target/debug'
sys.base_exec_prefix = '/Users/user/code/rust/test/target/debug'
sys.platlibdir = 'lib'
sys.executable = '/Users/user/code/rust/test/target/debug/test'
sys.prefix = '/Users/user/code/rust/test/target/debug'
sys.exec_prefix = '/Users/user/code/rust/test/target/debug'
sys.path = [
'/Users/user/code/rust/test/target/debug/lib/python310.zip',
'/Users/user/code/rust/test/target/debug/lib/python3.10',
'/Users/user/code/rust/test/target/debug/lib/python3.10/lib-dynload',
]
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Dynamic("during initializing Python main: init_fs_encoding: failed to get the Python codec of the filesystem encoding")', src/main.rs:11:59
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
```
```
fn main() {
let mut config = OxidizedPythonInterpreterConfig::default();
config.interpreter_config.filesystem_encoding = Some("utf-8".to_string());
#config.interpreter_config.python_path_env = Some("/Users/user/code/rust/test/test/venv/bin/python".to_string());

// Initialize the Python interpreter
let gil = pyembed::MainPythonInterpreter::new(config).unwrap();
gil.with_gil(|py| {
let result = py.run("print('Hello, Python!')", None, None);
});
}
```

Reproduce the macOS virtualenv failure using the configuration shown in src/main.rs, then compare it with the working bench configuration and the interpreter settings in the report. Done means the default configuration initializes Python without the init_fs_encoding failure and the behavior is verified for this case.

Written by the indexing model from the issue text.