feat(metrics): add traditional methods for comparison

[calico-1226]

Description

Describe your changes in detail.

Motivation and Context

While some traditional methods may not precisely capture human value preferences, they are usually faster and cheaper to compute. Therefore, we will integrate some traditional metrics into the SafeSora library, expecting they will complement feedback-based methods and enable comparative analysis.

These methods include:

• PSNR vs. Informativeness: PSNR measures the quality of a reconstructed or compressed image/video by comparing it to the original, and assessing their similarity. We evaluate dynamic changes in the video by analyzing PSNR between the first and subsequent frames.
• HPSv2 vs. Aesthetic: HPSv2 predicts human preferences for image beauty. We use it to assess the aesthetics of each video frame, averaging the results for an overall aesthetic measure.
• CLIP vs. Instruction Following: CLIP assesses instruction adherence by evaluating the similarity between the prompt and video frames.

More methods will be added gradually in the future.

• I have raised an issue to propose this change (required for new features and bug fixes)

See #4

Types of changes

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds core functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (update in the documentation)

Checklist

Go over all the following points, and put an x in all the boxes that apply.
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• My change requires a change to the documentation.
• I have updated the tests accordingly. (required for a bug fix or a new feature)
• I have updated the documentation accordingly.
• I have reformatted the code using make format. (required)
• I have checked the code using make lint. (required)
• I have ensured make test pass. (required)