Feature/add graph to v3

[!IMPORTANT] Adds graph management capabilities to the v3 API, including graph creation, entity and relationship handling, and community operations, with updated models, SDK, and test scripts.

Graph Feature:

Adds graph creation, entity, relationship, and community management to v3 API.

Implements create_graph, delete_graph, list_entities, create_communities, and tune_prompt in graph_router.py.

Updates KGService with methods for graph operations like kg_triples_extraction, kg_entity_description, and kg_clustering.

Models and Settings:

Introduces KGCreationSettings, KGEnrichmentSettings, and KGEntityDeduplicationSettings in kg.py.

Updates prompt names to graphrag_triples_extraction_few_shot, graphrag_entity_description, and graphrag_community_reports.

SDK and Client:

Adds GraphsSDK in graphs.py for interacting with graph endpoints.

Supports operations like create, delete, list_entities, and tune_prompt.

Testing and Examples:

Adds test scripts in test_v3_sdk_graph.py for graph operations.

Updates existing test scripts to use new graph features.

Miscellaneous:

Refactors and cleans up code in various pipes like community_summary.py and entity_description.py.

Updates prompt_tuning.yaml for new prompt tuning logic.

^{This description was created by}^{for 370d947b089e13d3210af0358a8a3537c998696b. It will automatically update as commits are pushed.}

SciPhi-AI / R2R

Feature/add graph to v3 #1565