Specify Column Name for Replay Weather Interpolation

[s2t2]

In the Replay Weather Controller's _get_interpolated_value function, we are currently passing the list of values to be interpolated, but this requires a separate property for each column of values (e.g. humidities, etc.).

If possible, let's implement a more flexible interface where we can just pass the column name (instead of the values).

Originally posted by @s2t2 in #148

[Mustaphayinka]

I'd like to pick this up, planning to update _get_interpolated_value to accept a column name string and look it up from weather_df internally, rather than requiring a separate property per column.