Allow prp and f_offset to accept List types

Updated the Transmitter class to accept List types for the prp and f_offset parameters, increasing flexibility for input data formats.

Author: zpeng

src/radarsimpy/transmitter.py

@@ -217,8 +217,8 @@ def __init__(  # pylint: disable=too-many-arguments, too-many-positional-argumen
         t: Union[float, List, NDArray],
         tx_power: float = 0,
         pulses: int = 1,
-        prp: Optional[Union[float, NDArray]] = None,
-        f_offset: Optional[Union[float, NDArray]] = None,
+        prp: Optional[Union[float, List, NDArray]] = None,
+        f_offset: Optional[Union[float, List, NDArray]] = None,
         pn_f: Optional[NDArray] = None,
         pn_power: Optional[NDArray] = None,
         channels: Optional[List[Dict]] = None,