def read_file_content(file_path: str) -> str:
    """
    Reads and returns the content of a file.

    Args:
        file_path (str): The path to the file to read.

    Returns:
        str: The content of the file.

    Raises:
        FileNotFoundError: If the file does not exist.
        IOError: If the file cannot be read.
    """
    try:
        with open(file_path, "r") as file:
            content = file.read()
        return content
    except FileNotFoundError:
        raise FileNotFoundError(f"The file '{file_path}' does not exist.")
    except IOError:
        raise IOError(f"Unable to read the file '{file_path}'.")