feat: add gui config for cli command

cli/src/models/gui_config.py

@@ -0,0 +1,30 @@
+from typing import Optional
+
+from pydantic import BaseModel, model_validator
+
+from core.enums import GuiOption
+
+
+class GuiConfig(BaseModel):
+    gui_option: GuiOption
+    raw_ui_filename: Optional[str] = None
+
+    def should_create_ui(self):
+        return self.gui_option == GuiOption.NEW
+
+    @property
+    def ui_filename(self) -> str:
+        if self.raw_ui_filename is None:
+            raise ValueError("ui_filename is None")
+
+        return self.raw_ui_filename
+
+    @model_validator(mode="after")
+    def validate_dependent_options(self):
+        if self.gui_option == GuiOption.EXISTING and self.raw_ui_filename is None:
+            raise ValueError("--ui-filename is required when --gui-option is 'existing'.")
+
+        if self.gui_option == GuiOption.NONE and self.raw_ui_filename:
+            raise ValueError("Cannot specify --ui-filename when --gui-option is 'none'.")
+
+        return self