Data Structure needs to be changed to Nod/children

List of strings won't work much longer

Will work on this after paper, most likely.

This is going to be needed, if statements are used in most parsers and they aren't two children nodes

No file or test is named. Start by locating the current list-of-strings data structure and the parser code that consumes it, then trace how conditional statements are represented. Done means the structure supports nodes with children, including the two-child form needed by if statements, without breaking existing parser behavior.

Written by the indexing model from the issue text.