Perf: Change the JSON parser

[Tomcat-42]

The actuall JSON parser, https://github.com/nlohmann/json, imposes serious performance issues when serializing large results form simulations.

Then, It would be necessary to use one of the alternative to parse JSON:

• https://github.com/simdjson/simdjson
• https://github.com/stephenberry/glaze

Tasks:

• [x] Inital assertion of performance/usage of the libs
• [ ] Change the parser in the code

[Tomcat-42]

Actually both the libs doesn't work with the nvc++ compiler :(