MNT: pylint adjustments for new methods in function.py

- MNT: disables pylint unused private member for get_value_opt_grid as it is called upon dynamically by from_grid

- MNT: disabled pylint too many statement for from_grid for now and added a to-do to refactor it into smaller methods/helper functions

- MNT: updated .pylintrc to record Re as good name

Author: aZira371

.pylintrc

@@ -229,6 +229,7 @@ good-names=FlightPhases,
            center_of_mass_without_motor_to_CDM,
            motor_center_of_dry_mass_to_CDM,
            generic_motor_cesaroni_M1520,
+           Re, # Reynolds number
 
 # Good variable names regexes, separated by a comma. If names match any regex,
 # they will always be accepted

rocketpy/mathutils/function.py

@@ -672,7 +672,7 @@ def __get_value_opt_nd(self, *args):
 
         return result
 
-    def __get_value_opt_grid(self, *args):
+    def __get_value_opt_grid(self, *args): # pylint: disable=unused-private-member
         """Evaluate the Function using RegularGridInterpolator for structured grids.
 
         This method is dynamically assigned in from_grid() class method.
@@ -4057,7 +4057,7 @@ def from_grid(
         interpolation="linear_grid",
         extrapolation="constant",
         **kwargs,
-    ):
+    ): # pylint: disable=too-many-statements #TODO: Refactor this method into smaller methods
         """Creates a Function from N-dimensional grid data.
 
         This method is designed for structured grid data, such as CFD simulation