Add NAAb polyglot programming language

[b-macker]

Summary

• Adds NAAb to the N section (alphabetical order, count updated from 29 to 30)
• NAAb is a polyglot programming language that integrates 12 languages (Python, JavaScript, Rust, C++, Go, C#, Ruby, PHP, Shell, Nim, Zig, Julia) through a block system
• Built on 15,000+ lines of C++17 with a recursive descent parser
• Open source (MIT), actively maintained

Links

• Repository: https://github.com/b-macker/NAAb
• Landing page: https://b-macker.github.io/NAAb/
• PLDB entry: merged via PR #638