put linea dir in root

lineapy/utils/config.py

@@ -11,21 +11,13 @@
 
 def linea_folder() -> Path:
     """
-    Finds the closest `.linea` folder, raising an exception if one does not exist.
+    Linea folder exists at the root user level (via `Path.home()`).
     """
-    cwd = Path(".").resolve()
-    for i, dir in enumerate([cwd, *cwd.parents]):
-        possible_linea_folder = dir / FOLDER_NAME
-        if possible_linea_folder.is_dir():
-            # Return path relative to CWD, so that it is stable
-            # regardles of parent path in subdirectories
-            # for notebook output
-            return Path("./" + "../" * i) / FOLDER_NAME
-
-    # you are here because you could not find a .linea folder anywhere. #418 says create one.
-    logger.warning(
-        "No .linea folder found. Creating a new folder in current directory."
-    )
-    cwd_linea_folder = Path(".").resolve() / FOLDER_NAME
-    cwd_linea_folder.mkdir(parents=False, exist_ok=True)
-    return cwd_linea_folder
+    # TODO: add a special case for tests (or some scoping config)
+    linea_folder = Path.home() / FOLDER_NAME
+    if not linea_folder.exists():
+        logger.warning(
+            f"No {FOLDER_NAME} folder found. Creating a new folder in {Path.home()} directory."
+        )
+        linea_folder.mkdir(parents=False, exist_ok=True)
+    return linea_folder