Implemented content upload app with tests and pre-commit hooks

tests/test_settings.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from content_automation.settings import AppSettings
+
+
+def test_settings_parse_nested_env(monkeypatch) -> None:
+    monkeypatch.setenv("CONTENT_AUTOMATION_TARGET_SOCIAL_NETWORKS", '["youtube"]')
+    monkeypatch.setenv("CONTENT_AUTOMATION_YOUTUBE__ACCESS_TOKEN", "yt-token")
+    monkeypatch.setenv("CONTENT_AUTOMATION_YOUTUBE__USE_RESUMABLE_UPLOAD", "true")
+    monkeypatch.setenv("CONTENT_AUTOMATION_STORAGE__BACKEND", "s3")
+    monkeypatch.setenv("CONTENT_AUTOMATION_STORAGE__S3__BUCKET_NAME", "bucket-a")
+
+    settings = AppSettings()
+
+    assert settings.target_social_networks == ["youtube"]
+    assert settings.youtube.access_token == "yt-token"
+    assert settings.youtube.use_resumable_upload is True
+    assert settings.storage.backend == "s3"
+    assert settings.storage.s3.bucket_name == "bucket-a"