Added support for Embedding and High-Dimensional Vector Calculation

[tobenot]

both cpp and blueprint :)

• Introduced UOpenAICallEmbedding class and related event bindings to support asynchronous execution of embedding API calls in Blueprint.
• Implemented the UOpenAIEmbedding class, which is responsible for managing the call and response process of embedding APIs. Added request timeout and heartbeat checking mechanisms, improving upon the Chat class.
• Added FEmbeddingSettings and FEmbeddingResult structures for configuring embedding requests and handling response results, providing structured data support for API interactions.
• Introduced optimized high-dimensional vector computation functions in OpenAIUtils utilizing the SIMD instruction set, including dot product, vector magnitude, and cosine similarity calculations, as well as their non-optimized versions, primarily used for computing the similarity of word embeddings.

This commit does not involve any deletions, only additions, and feature introductions.

I will continue to monitor and make adjustments and improvements based on real-world application scenarios.

[KellanM]

This is awesome, thanks for adding embeddings support!

cpp changes look good - testing locally and then I'll approve👍