🚀 Add Auto-Encoder based FRE

[nahuja-intel]

📝 Description

• Added lightning and torch models for FRE along with config file.

✨ Changes

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• 🔨 Refactor (non-breaking change which refactors the code base)
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• 📚 Documentation update
• 🔒 Security update

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[samet-akcay]

Some leftover here to be updated from DFM to FRE

[ashwinvaidya17]

Thanks! I only have minor comments

[samet-akcay]

Thanks for your effort