NDimensional functional inteface

[miranov25]

Here's a clearer and more polished version for your GitHub issue text:

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Feature Request: Support for N-dimensional Function Representation in RootInteractive

We would like to enable the representation of N-dimensional functions in RootInteractive, where:

• There are N input parameters and M output parameters
• Example use cases include:
  • Custom WebAssembly (WASM) functions
  • ONNX models
  • JavaScript functions

Requested Feature

Support registration of functions defined via:

• WebAssembly (WASM)
• ONNX
• JavaScript

These functions should be callable from within RootInteractive.

Preferred Interface Format

We propose a compact and expressive interface format such as:

((colOut0, colOut1, ..., colOutM), funName(colIn0, colIn1, ..., colInN))

Where:

• colInX are input columns
• colOutX are computed output columns
• funName refers to a registered function (WASM, ONNX, or JavaScript)

This would allow dynamic computation and visualization of function outputs within the interactive environment.