Adds LlamaCpp LLM

poetry.lock

pyproject.toml

semantic_router/llms/__init__.py

semantic_router/llms/base.py

semantic_router/llms/grammars/json.gbnf

semantic_router/llms/llamacpp.py

semantic_router/route.py

semantic_router/schema.py

semantic_router/utils/function_call.py

tests/unit/llms/test_llm_llamacpp.py