KCLayout to proxy Layout, make each layout a library layout to allow …

…inserting library cells

src/kfactory/conf.py

@@ -12,7 +12,7 @@
 import loguru
 from loguru import logger as logger
 from pydantic import BaseModel, Field
-from pydantic_settings import BaseSettings
+from pydantic_settings import BaseSettings, SettingsConfigDict
 
 if TYPE_CHECKING:
     from loguru import Logger
@@ -90,9 +90,17 @@ def get_affinity() -> int:
         return threads
 
 
-class Settings(BaseSettings):
+class Settings(
+    BaseSettings,
+):
     """KFactory settings object."""
 
+    model_config = SettingsConfigDict(
+        arbitrary_types_allowed=True,
+        env_prefix="kfactory_",
+        env_nested_delimiter="_",
+    )
+
     n_threads: int = get_affinity()
     logger: ClassVar[Logger] = logger
     logfilter: LogFilter = Field(default_factory=LogFilter)
@@ -105,15 +113,6 @@ def __init__(self, **data: Any):
         self.logger.add(sys.stdout, format=tracing_formatter, filter=self.logfilter)
         self.logger.info("LogLevel: {}", self.logfilter.level)
 
-    class Config:
-        """Pydantic settings."""
-
-        validation = False
-        arbitrary_types_allowed = True
-        # fields = {"logger": {"exclude": True}}
-        env_prefix = "kfactory_"
-        env_nested_delimiter = "_"
-
 
 config = Settings()