feat: move project from poetry to pdm, rewrite from scratch and add

basic `notebooks`, `edit` and `show` commands

tests/test_settings.py

@@ -0,0 +1,42 @@
+from pathlib import Path
+
+import pytest
+
+from halig.settings import Settings, load_from_file
+
+
+def test_settings_from_env(settings: Settings, notebooks_root_path_envvar):
+    from_env_settings = Settings()  # type: ignore[call-arg]
+    assert from_env_settings.notebooks_root_path == settings.notebooks_root_path
+
+
+def test_settings_from_non_existing_file_raises_value_error():
+    with pytest.raises(ValueError, match="field required"):
+        Settings()  # type: ignore[call-arg]
+
+
+def test_load_from_file(notebooks_path: Path, settings_file_path: Path):
+    settings = load_from_file(settings_file_path)
+    assert settings.notebooks_root_path == notebooks_path
+
+
+def test_load_from_non_xdg_home_config_raises_file_not_found_error(fs):
+    path = Path("~/.config").expanduser()
+    with pytest.raises(FileNotFoundError, match=f"File {path} does not exist"):
+        load_from_file()
+
+
+def test_load_from_existing_standard_file(settings_file_path: Path, settings: Settings):
+    standard_settings = load_from_file()
+    assert standard_settings.notebooks_root_path == settings.notebooks_root_path
+
+
+def test_load_from_empty_file_raises_value_error(empty_file_path: Path):
+    with pytest.raises(ValueError, match=f"File {empty_file_path} is empty"):
+        load_from_file(empty_file_path)
+
+
+def test_load_from_non_existing_file_path_raises_file_not_found_error(halig_path: Path):
+    file = halig_path / "some_invalid_file.yml"
+    with pytest.raises(FileNotFoundError, match=f"File {file} does not exist"):
+        load_from_file(file)