Case insensitive deserialization

Case insensitive deserialization - Growing up in Windows with BASIC you learn case doesn't matter, so Color is the same as COLOR or cOLOR when it comes to variable names. Same applies to @Formula or item names in Notes documents. On the other side, Linux, Java, JavaScript and JSON are very much case sensitive. This poses a challenge when deserializing (handcrafted) JSON files.
This is a companion discussion topic for the original entry at https://wissel.net/blog/2022/06/case-insensitive-deserialization.html