Mock LLM adapter for testing.

This adapter allows you to provide pre-configured responses for testing without making actual API calls.

Usage in Tests

# Configure mock responses
DeepEvalEx.LLM.Adapters.Mock.set_response("What is 2+2?", "4")

# Or use pattern matching
DeepEvalEx.LLM.Adapters.Mock.set_response(~r/capital.*France/, "Paris")

# Use the mock adapter
{:ok, result} = DeepEvalEx.evaluate(test_case, [metric],
  adapter: :mock
)

With Structured Outputs

DeepEvalEx.LLM.Adapters.Mock.set_schema_response(
  ~r/extract claims/,
  %{"claims" => ["claim 1", "claim 2"]}
)