[Feature] Get row by name

[SeanOMik]

Currently, the only way to get a row is by using indexes. Although it works fine, it can be difficult when modifying the structure of tables, and makes it harder to read the code. I'm coming from CDRS and they have a by_name trait which is implemented by their Row type.

I'm not sure if this is even possible on this driver since I haven't looked at the source. It also isn't a high priority feature, it's more of a QOL feature.

[wprzytula]

This is going to be solved by #462.

[wprzytula]

Done in #1057.