epic: Support Intel as Inference Engine

[dan-menlo]

WIP Spec

• Need to figure out if BigDL or Intel Extensions are separate
• Have Extensions for each inference engine
• model.json should have an engine: intel-bigdl or engine: intel-transformers

Resources

Intel BigDL https://github.com/intel-analytics/BigDL

Intel Extension for Transformers https://medium.com/intel-analytics-software/efficient-streaming-llm-with-intel-extension-for-transformers-runtime-31ee24577d26