Add Lex: declarative multi-target transpiler

[David-Imperium]

Lex - Declarative Multi-Target Transpiler

Lex is a C++ compiler that transforms declarative definitions into code for multiple targets:

What it does:

• Transpiles .lex definition files to multiple output formats
• Targets: Lua, GDScript (Godot), C# (Unity), JSON, and custom backends
• Designed for game modding, but extensible to any code generation use case

Why it's useful:

• Write once, generate for multiple engines/languages
• Declarative syntax, no runtime dependency
• Extensible backend system for custom targets

Links:

• Repository: https://github.com/David-Imperium/Lex-compiler
• License: MIT
• Documentation: https://github.com/David-Imperium/Lex-compiler#readme

Category: Scripting (similar to djinni, SWIG, CppSharp)

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Added to the Scripting section as it generates bindings/code for scripting languages used in game development.