feat: Add toxic meme detection via UDF

[leungyukshing]

Toxic Meme Detection

1. Integrated OCR text extractor and text meme classification model to identify harmful memes in a video.
2. Ways to create UDF to use our function

• Run the following command:
  CREATE UDF IF NOT EXISTS HarmfulMemeDetector INPUT (data NDARRAY (3,ANYDIM,ANYDIM)) OUTPUT (labels TEXT(10)) TYPE Classification IMPL 'eva/udfs/harmful_meme_detector.py';

To test this function, please follow these steps:

1. LOAD FILE "data/meme/meme.mp4" INTO MEMEVideoTable; (meme.mp4 is available here)
2. SELECT id, HarmfulMemeDetector(data).labels FROM MEMEVideoTable WHERE id = 5; (test a single frame)
3. SELECT id, HarmfulMemeDetector(data).labels FROM MEMEVideoTable WHERE id < 50; (test a clip)

[jarulraj]

Good PR! Integrated into #551