feat: Added code for qna_using_query_routing using Gemini

gemini/use-cases/retrieval-augmented-generation/qna_using_query_routing/config.ini

@@ -0,0 +1,41 @@
+[default]
+project_id = genai-github-assets
+region = us-central1
+enabled_programming_language = python
+default_language = python
+
+[vector_search]
+embedding_qpm = 100
+embedding_num_batch = 5
+me_region = us-central1
+me_index_name = genai-github-assets-index
+me_gcs_bucket_region = us-central1
+me_gcs_bucket = 
+me_dimensions = 768
+embedding_model_name = textembedding-gecko
+split_document_method = CHUNKS
+chunk_size = 5000
+chunk_overlap = 100
+embedding_jsonl_file = data.jsonl
+embedding_csv_file = embedding_df.csv
+
+[genai_chat]
+model_name = gemini-1.0-pro
+temperature = 0
+max_output_tokens = 1024
+
+[genai_qna]
+model_name = gemini-1.0-pro
+max_output_tokens = 1024
+temperature = 0.3
+top_p = 0.8
+top_k = 40
+number_of_references_to_summarise = 6
+
+[error_msg]
+non_programming_question_error_msg = I apologize, I am configured to answer only in these programming languages Python programming. Specify the programming language in your query to get more accurate and helpful answers.
+non_qna_programming_question_error_msg = I apologize, I am configured to answer only in these programming languages Python. Specify the programming language in your query to get more accurate and helpful answers.
+unable_to_understand_question = I apologize, but I am not able to understand the question. Please try to elaborate and rephrase your question.
+other_intent_error_msg = I apologize, I am allowed to answer programming related questions only.
+no_reference_error_msg = I could not find any references that are directly related to your question in the knowledgebase. Please try to elaborate and rephrase your question.
+