Develop s2dv cube namedims

Added some checks into the function s2dv_cube.R to check if lon and lat parameters have dimension names. If they don't have named dimension it adds a name of the corresponding dimension in data. A part from the checks commented above, the function also will return error if lon vector is provided but data doesn't have longitudinal dimension. In the case that longitudinal dimension is not lon or longitude but it has the same name and same length of the lon vector it returns only a warning. While in the case parameter lon doesn't have dimension name it returns an error. The same development is done for latitude.

The conditionals are organized by the following:

1. The first condition checks if data dimensions contain either lon or longitude. Then if the length or the dimension name of lon vector are not consistent with longitudinal dimension of data it returns an error.

2. If the first condition is FALSE, then there is the second condition. Here, it checks if lon vector has dimension name and if this name is inside data dimensions. Then, if the length of lon vector and longitudinal dimension are the same it returns a warning notifying that the name is not expected by s2dv_cube. In the case longitudes are different, it returns an error.

3. If neither condition 1 nor 2 are TRUE it returns an error.