style: unify code formatting and import order

- Remove trailing whitespace and normalize blank lines
- Unify string quotes and line breaks for long lines
- Sort imports alphabetically across modules

nanobot/config/__init__.py

@@ -1,6 +1,6 @@
 """Configuration module for nanobot."""
 
-from nanobot.config.loader import load_config, get_config_path
+from nanobot.config.loader import get_config_path, load_config
 from nanobot.config.schema import Config
 
 __all__ = ["Config", "load_config", "get_config_path"]

nanobot/config/schema.py

@@ -3,7 +3,7 @@
 from pathlib import Path
 from typing import Literal
 
-from pydantic import BaseModel, Field, ConfigDict
+from pydantic import BaseModel, ConfigDict, Field
 from pydantic.alias_generators import to_camel
 from pydantic_settings import BaseSettings