[Enhancement] Added text_to_speech, text_to_image, image_edit example tasks

[psriramsnc]

🚀 Summary

A brief overview of what this PR does. Explain the purpose and context.

This PR adds a set of multimodal example tasks to the SyGra repository, showcasing how the framework can be used for integrated multimodal synthetic data generation workflows. These examples provide practical reference tasks demonstrating text-to-speech, text-to-image, and image edit capabilities using SyGra’s graph-oriented pipeline framework.

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✨ Explain the features implemented:

• 🧠 Multimodal Example Tasks: Added example tasks demonstrating text-to-speech, text-to-image, and image edit workflows so users can explore multimodal generation within SyGra.
• 📄 Documentation of Usage: Included sample task definitions and usage notes to help users run and understand these multimodal examples.

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📊 Performance impact (if any):

N/A

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🧪 How to Test the feature

Steps for reviewers to verify functionality:

1. 📂 Navigate to the newly added example tasks folder (e.g., tasks/examples/).
2. ▶️ Run each example (e.g., text-to-speech, text-to-image, image edit) via the SyGra CLI or Python API as documented.
3. ✅ Observe that outputs are generated as expected — audio for TTS, images for TTI, and edited images for the edit example.

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📸 Screenshots (if applicable)

N/A

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🧾 Checklist

• ✅ Lint fixes and unit testing done
• 🔁 End to end task testing
• 📚 Documentation updated

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📝 Notes

N/A

[zephyrzilla]

LGTM 🚀