Many small improvements, new benchmark results!

gpt_engineer/main.py

@@ -7,6 +7,7 @@ from pathlib import Path
 
 import typer
 
+from gpt_engineer import steps
 from gpt_engineer.ai import AI
 from gpt_engineer.db import DB, DBs
 from gpt_engineer.steps import STEPS
@@ -20,7 +21,9 @@ def main(
     delete_existing: bool = typer.Argument(False, help="delete existing files"),
     model: str = "gpt-4",
     temperature: float = 0.1,
-    steps_config: str = "default",
+    steps_config: steps.Config = typer.Option(
+        steps.Config.DEFAULT, "--steps", "-s", help="decide which steps to run"
+    ),
     verbose: bool = typer.Option(False, "--verbose", "-v"),
     run_prefix: str = typer.Option(
         "",