merge

Added dual query retrieval feature

Added debugging properties to UI

Connected the rewriting methods to front end

Integrated query rewriting to system and added unit tests

Added fallback methods, returns the unchanged prompt if fails, also added context appending rule based

Query rewriter class added for stronger context preservation

Persistence of chunked documents and unit tests

Added base doc loading feature and unit tests

Unit tests finalized

Document processing utility functions and unit tests implemented.

llm generator unit tests implemented

Implemented retrieval unit tests

VectorStore unit tests implemented

Written unit tests for embedder class