[ENH] Refactor GeophysicsInput with type annotations

Replaced raw tensor attributes with `Annotated` numpy arrays for better type validation and integrated a short numpy array validator. This improves code clarity and enforces input validation.

Author: Leguark

gempy_engine/core/data/geophysics_input.py

@@ -1,9 +1,12 @@
 from dataclasses import dataclass
+from typing import Annotated
 
-from ..backend_tensor import BackendTensor
+import numpy as np
+
+from .encoders.converters import numpy_array_short_validator
 
 
 @dataclass
-class GeophysicsInput():
-    tz: BackendTensor.t
-    densities: BackendTensor.t
+class GeophysicsInput:
+    tz: Annotated[np.ndarray,  numpy_array_short_validator]
+    densities: Annotated[np.ndarray,  numpy_array_short_validator]