New Feature: Adding watsonx.ai LLM Platform support

[ticlazau]

Pull Request Type

• [x] ✨ feat
• [ ] 🐛 fix
• [ ] ♻️ refactor
• [ ] 💄 style
• [ ] 🔨 chore
• [ ] 📝 docs

What is in this change?

Adding watsonx.ai support as LLM Platform

Additional Information

New LLM backend supporing various LLMs is added. Running watsonx.ai will require:

• WATSONX_AI_ENDPOINT
• WATSONX_AI_APIKEY
• WATSONX_AI_PROJECT_ID
• WATSONX_AI_MODEL (i.e meta-llama/llama-2-70b-chat)
• WATSONX_EMBEDDING_MODEL_PREF (i.e. baai/bge-large-en-v1) In addition, we are intorducing AI Guardrails for input and LLM output

Developer Validations

• [ x] I ran yarn lint from the root of the repo & committed changes
• [ x] Relevant documentation has been updated
• [ x] I have tested my code functionality
• [x ] Docker build succeeds locally