In Additional with the solution-1. As you mentioned later on it would be a big table. Write your own classes according to config files and go with either XML or JSON because these formats are human-readable, easy to parse and available in most programming languages. After that easy to enlarge our schema as when expected.
Map the configuration according to the XML:Tags or JSON:Keys names to describe the contents of the elements. So, both types of files can be useful to view, even in a simple text editor. Over XML and JSON you can check the comparison, features and examples with following link:
JSON vs XML in 2022: Comparison, Features & Example