TIMIT Demo example

## 🚀 Feature Request

Would it be possible to upload an example for TIMIT for demonstration purpose? All other Speech Recognition datasets are kinda too large to download when just trying out this repo. Having TIMIT would make allow people new to ASR to quickly try out and appreciate the convinience of this framework. Thanks.

### Motivation

### Pitch

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### Additional context

The issue requests a small TIMIT demonstration for this Python speech-recognition toolkit but names no files, tests, or entry points. First inspect the repository's existing dataset examples and determine how a TIMIT demo would fit them. Done means newcomers can use the example to try the framework without downloading a large dataset.

Written by the indexing model from the issue text.