Update README with CI and Pages badges

Add GitHub Pages deployment workflow

Add security policy

Add FUNDING.yml for Buy Me a Coffee sponsor button

Add Buy Me a Coffee link to README

Fix terraform validation and Python lint issues

fix: update CI workflow and format code with black and terraform fmt

Add missing Terraform files: VPC and OpenSearch Serverless configuration

Add missing application files: embeddings, bedrock LLM, schemas, and main FastAPI app

Initial commit: RAG Ops Knowledge Base with FastAPI, Bedrock, OpenSearch, and Terraform