Add temperature attribute to Alloy class

src/pymatlib/core/alloy.py

@@ -109,6 +109,7 @@ class Alloy:
     latent_heat_of_vaporization: PropertyTypes = None
     specific_enthalpy: PropertyTypes = None
     surface_tension: PropertyTypes = None
+    temperature: PropertyTypes = None
     temperature_array: np.ndarray = field(default_factory=lambda: np.array([]))
     thermal_diffusivity: PropertyTypes = None
     thermal_expansion_coefficient: PropertyTypes = None