Testing for stimulus extraction

[Hugo-W]

Add Stimulus Feature Extraction module: the module was added but need further testing.

Description

Library currently focuses on TRF computation given pre-extracted features. Need integrated tools for modern stimulus feature extraction to streamline naturalistic experiment workflows.
Tasks

Create StimulusEncoder base class or module
Implemented:
    Acoustic embeddings (wav2vec2, HuBERT for audio stimuli)
    Linguistic embeddings (BERT, transformer-based models for word/phoneme features)
    Wrapper for user-defined feature extractors
    Automatic checks for feature/signal alignment
    Dimensionality validation
    Temporal coherence checks

To add

Integrated feature extraction tools for common modalities
Quality control and validation automated
Examples on simple data

Full test suite

Priority

High

From external analysis: Advanced Stimulus Feature Extraction & Embedding Module