refactor: rework configuration models, add CLI, tests and VSCode settings

- Replace hardcoded CONFIG_PATH with appdirs AppDirs (use app.user_config_dir) and update SETTINGS_PATH
- Rework dataclasses: add Library, QbitTorrent; convert Komga.libraries to List[Library]; use Path for media_path; add getLibraryByName and proper __post_init__ conversions
- Extend KomGrabber to support downloader/downloader_settings (aria2/qbit), normalize Path handling and expanduser usage
- Add type fixes, utility methods (getattr/_setattr) and API __post_init__ to convert nested dicts to dataclass instances
- Add package CLI entrypoints (__main__.py, src package main) and simple runner (main.py)
- Add tests for package __init__ CLI and config behavior (tests/*) and a small test script (test.py)
- Add .vscode/settings.json for pytest integration
- Tidy pyproject.toml: format dependencies, add dev/test dependency groups and fix trailing newline in bumpversion section

pyproject.toml

@@ -5,14 +5,23 @@ description = "A small library providing a config class that provides settings d
 readme = "README.md"
 authors = [{ name = "WorldTeacher", email = "coding_contact@pm.me" }]
 requires-python = ">=3.13"
-dependencies = ["omegaconf>=2.3.0"]
+dependencies = [
+    "appdirs>=1.4.4",
+    "omegaconf>=2.3.0",
+]
 
 [build-system]
 requires = ["hatchling"]
 build-backend = "hatchling.build"
 
 [dependency-groups]
-test = ["pytest>=8.3.4"]
+dev = [
+    "pip>=25.1.1",
+]
+test = [
+    "pytest>=8.3.4",
+    "pytest-cov>=6.1.1",
+]
 
 [tool.bumpversion]
 current_version = "0.2.0"
@@ -34,4 +43,4 @@ moveable_tags = []
 commit_args = ""
 setup_hooks = []
 pre_commit_hooks = []
-post_commit_hooks = []
+post_commit_hooks = []