fix 'FileNotFoundError' in polars detection function
We simply don't put Polars as a supported library when we're not able to detect if it's JSON or JSONL.

TODO: transform `**/*` to a list of files? In the case of `datasets/tcor0005/langchain-docs-400-chunksize`, it's a single file

---

The error we fix:

```
tests/job_runners/dataset/test_compatible_libraries.py:564:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
src/worker/job_runners/dataset/compatible_libraries.py:700: in get_polars_compatible_library
    is_json_lines = ".jsonl" in first_file or HfFileSystem(token=hf_token).open(first_file, "r").read(1) != "["
.venv/lib/python3.9/site-packages/fsspec/spec.py:1281: in open
    self.open(
.venv/lib/python3.9/site-packages/fsspec/spec.py:1293: in open
    f = self._open(
.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:236: in _open
    return HfFileSystemFile(self, path, mode=mode, revision=revision, block_size=block_size, **kwargs)
.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:687: in __init__
    self.details = fs.info(self.resolved_path.unresolve(), expand_info=False)
.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:520: in info
    self.ls(parent_path, expand_info=False)
.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:294: in ls
    _raise_file_not_found(path, None)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

path = 'datasets/tcor0005/langchain-docs-400-chunksize/**', err = None

    def _raise_file_not_found(path: str, err: Optional[Exception]) -> NoReturn:
        msg = path
        if isinstance(err, RepositoryNotFoundError):
            msg = f"{path} (repository not found)"
        elif isinstance(err, RevisionNotFoundError):
            msg = f"{path} (revision not found)"
        elif isinstance(err, HFValidationError):
            msg = f"{path} (invalid repository id)"
>       raise FileNotFoundError(msg) from err
E       FileNotFoundError: datasets/tcor0005/langchain-docs-400-chunksize/**

.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:868: FileNotFoundError
```
fix 'FileNotFoundError' in polars detection function: We simply don't put Polars as a supported library when we're not able to detect if it's JSON or JSONL.

TODO: transform `**/*` to a list of files? In the case of `datasets/tcor0005/langchain-docs-400-chunksize`, it's a single file

---

The error we fix:

```
tests/job_runners/dataset/test_compatible_libraries.py:564:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
src/worker/job_runners/dataset/compatible_libraries.py:700: in get_polars_compatible_library
    is_json_lines = ".jsonl" in first_file or HfFileSystem(token=hf_token).open(first_file, "r").read(1) != "["
.venv/lib/python3.9/site-packages/fsspec/spec.py:1281: in open
    self.open(
.venv/lib/python3.9/site-packages/fsspec/spec.py:1293: in open
    f = self._open(
.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:236: in _open
    return HfFileSystemFile(self, path, mode=mode, revision=revision, block_size=block_size, **kwargs)
.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:687: in __init__
    self.details = fs.info(self.resolved_path.unresolve(), expand_info=False)
.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:520: in info
    self.ls(parent_path, expand_info=False)
.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:294: in ls
    _raise_file_not_found(path, None)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

path = 'datasets/tcor0005/langchain-docs-400-chunksize/**', err = None

    def _raise_file_not_found(path: str, err: Optional[Exception]) -> NoReturn:
        msg = path
        if isinstance(err, RepositoryNotFoundError):
            msg = f"{path} (repository not found)"
        elif isinstance(err, RevisionNotFoundError):
            msg = f"{path} (revision not found)"
        elif isinstance(err, HFValidationError):
            msg = f"{path} (invalid repository id)"
>       raise FileNotFoundError(msg) from err
E       FileNotFoundError: datasets/tcor0005/langchain-docs-400-chunksize/**

.venv/lib/python3.9/site-packages/huggingface_hub/hf_file_system.py:868: FileNotFoundError
```