add examples back

dataset/example/electro_1.json

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+{"key": "", "artist": "Voyager I", "sample_rate": 48000, "file_extension": "mp3", "description": "A cool song from Voyager.", "keywords": "bright, pulsing, cool", "duration": 15.0, "bpm": "", "genre": "electronic", "title": "Enracinement", "name": "electro_1", "instrument": "Mix", "moods": ["uplifting", "motivational"]}

dataset/example/electro_2.json

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+{"key": "", "artist": "Voyager I", "sample_rate": 44100, "file_extension": "mp3", "description": "This is an electronic song sending positive vibes.", "keywords": "", "duration": 20.0, "bpm": "", "genre": "electronic", "title": "Untitled song", "name": "electro_2", "instrument": "Mix", "moods": []}

egs/example/data.jsonl

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+{"path": "dataset/example/electro_1.mp3", "duration": 15.024, "sample_rate": 48000, "amplitude": null, "weight": null, "info_path": null}
+{"path": "dataset/example/electro_2.mp3", "duration": 20.035918367346937, "sample_rate": 44100, "amplitude": null, "weight": null, "info_path": null}