Meta: Audio Data Model and I/O Improvements

[satra]

Umbrella issue for Audio object and data I/O improvements.

Sub-issues

• Task: add basic operations to Audio #325 Add basic operations to Audio (max, min, etc.)
• Support File class as input when loading audio files #372 Support File class as input when loading audio files
• Task: Add utilities for i/o and file system exploration #370 Add utilities for i/o and file system exploration
• Add BIDS utilities for loading datasets in BIDS-like format #373 Add BIDS utilities for loading datasets in BIDS-like format
• Task: Filtering audio samples by whether or not the number of words falls within a certain range #289 Filtering audio samples by word count range

Scope

Improve the Audio data model with basic operations (#325), accept File objects (#372), add filesystem utilities for discovering audio/video files (#370), support BIDS-like dataset loading (#373), and add content-based filtering (#289).