Experiment with Designated Initializers in the repo for readability

[someone2639]

referencing this document

On some tables/structs in the repo, having an explicit note of what the data corresponds to will be very beneficial to readability in my opinion.

Benefits:

• Allows out-of-order struct and array initialization
• No need to cross-reference struct/array definitions

Downsides:

• If this were to affect the entire repo, in some small cases it's more work than it's worth (the Linux kernel has a ton of examples where for the sake of readability they create an enum for a 3-element array that is never used anywhere else)
• New users might be confused on the syntax at first (even I was when I first saw it on an array in Linux)

Therefore I only envision this being useful in certain cases where readability takes a hit (looking at #467)