feat: gestion globale des preferences et creation auto des dossiers

- Deplacement des preferences globales vers ~/.PyCompiler_ARK avec logique de migration.
- Creation automatique des dossiers 'engines' et 'Plugins' s'ils sont inexistants.
- Unification des noms de dossiers en minuscules pour la coherence.

Author: raidos23

Core/Auto_Command_Builder/auto_build.py

@@ -614,12 +614,12 @@ def compute_for_all(
                     ordered.append(e)
         except Exception:
             pass
-        # 2) moteurs sous ENGINES/<engine_id>/mapping.json (plug-and-play)
+        # 2) moteurs sous engines/<engine_id>/mapping.json (plug-and-play)
         try:
             project_root = os.path.abspath(
                 os.path.join(os.path.dirname(__file__), os.pardir, os.pardir)
             )
-            engines_root = os.path.join(project_root, "ENGINES")
+            engines_root = os.path.join(project_root, "engines")
             if os.path.isdir(engines_root):
                 for name in sorted(os.listdir(engines_root)):
                     d = os.path.join(engines_root, name)

Loaders/EngineLoader/loader.py

@@ -134,11 +134,13 @@ def _discover_external_plugins(
 
 
 def _auto_discover() -> None:
-    """Discover and register external engine plugins from the project ENGINES folder."""
+    """Discover and register external engine plugins from the project engines folder."""
     base_dir = os.path.dirname(__file__)
     try:
         project_root = os.path.abspath(os.path.join(base_dir, os.pardir, os.pardir))
         external_dir = os.path.join(project_root, "engines")
+        # Ensure directory exists for auto-discovery
+        os.makedirs(external_dir, exist_ok=True)
         _discover_external_plugins(external_dir, namespace_package="engines")
     except Exception:
         logger.exception("Automatic engine discovery failed")

Ui/Cli/discovery.py

@@ -11,7 +11,12 @@ def _project_root() -> Path:
 
 
 def _plugins_root() -> Path:
-    return _project_root() / "Plugins"
+    path = _project_root() / "Plugins"
+    try:
+        path.mkdir(parents=True, exist_ok=True)
+    except Exception:
+        pass
+    return path
 
 
 def _read_version_from_init(rel_path: str) -> str:
@@ -230,7 +235,7 @@ def bcasl_doctor_payload(workspace: str | None = None) -> dict[str, Any]:
 def scaffold_engine(target_name: str, root_dir: str | None = None) -> dict[str, Any]:
     safe = str(target_name).strip().replace("-", "_").replace(" ", "_").lower()
     base_root = Path(root_dir or Path.cwd())
-    engine_dir = base_root / "ENGINES" / safe
+    engine_dir = base_root / "engines" / safe
     lang_dir = engine_dir / "languages"
     created: list[str] = []
     if engine_dir.exists():

bcasl/Loader.py

@@ -321,9 +321,16 @@ def _run_bcasl_sync(
 
 def _get_plugins_dir() -> Path:
     try:
-        return Path(__file__).resolve().parents[1] / "Plugins"
+        path = Path(__file__).resolve().parents[1] / "Plugins"
+        path.mkdir(parents=True, exist_ok=True)
+        return path
     except Exception:
-        return Path("Plugins")
+        fallback = Path("Plugins")
+        try:
+            fallback.mkdir(parents=True, exist_ok=True)
+        except Exception:
+            pass
+        return fallback
 
 
 def _resolve_ordered_plugin_ids(