[KM-438][KM-439] Improve Retrieval and Querying feature (#15)

Make a query for tabular (XLSX and CSV) (#14)

Merge dev_new to main (improve retriever and add querying) (#13)

[NOTICKET] fix error in imports

[KM-436][KM-437] add and modify for database and document pipeline (#3)

[KM-467] [DED][AI] Orchestration Agent - Init