Run once utility to automate creation of "member_details" where it doesn't already exist

[pfreitag]

@garethedwards-tass - in general I'm ok with adding the member_details, but as for the utility is there a reason to use custom built json functions, rather than the builtin: isJSON, serializeJSON and deserializeJSON?

[garethedwards-tass]

For these changes in particular the goal was to reduce additional changes to the json files

[KamasamaK]

1. base_param_index should be a number, not a string.
2. It looks like returns is set to any for all of them, which should not be the case.

I don't feel it's necessary to have this utility as part of the commit. As you said, it's a "run once" utility and we should expect newly added functions to include member_details. I would recommend just including the JSON file changes in the commit and update the returns values. They will usually be the same as the returns value of the function itself, and in the rare cases it's not you can manually correct that before committing.

[ghedwards]

@KamasamaK I've removed the utilities

[ghedwards]

@KamasamaK I've updated the return types