Add deck name to magic arena exports

Implement this new feature mentioned in MTG Arena updates found here

You Can Now Import Deck Names

Deck names can now be included when importing your deck files!

To use this feature, add an “About” section in your decklist file. Below that, add “Name” followed by the name of your deck. Your imported deck will appear with that name rather than the generic “Imported Deck.”

For example, if you want to import your Mono-Red Aggro deck, the start of your decklist file might look like this:

1 About
2 Name Mono-Red Aggro
3
4 Deck
5 24 Mountain
6 4 Shock
7 …

This addition is completely optional, and decklist files without it will continue to successfully import. If you are a content creator that provides decklists designed for import into MTG Arena, please consider adding this section to your output!