Project.load: accept SerenaConfig instead of global_ignored_paths

Use `serena_config: SerenaConfig | None` without a default value,
requiring callers to explicitly pass the configuration.

src/serena/project.py

@@ -133,8 +133,8 @@ class Project(ToStringMixin):
     def load(
         cls,
         project_root: str | Path,
+        serena_config: "SerenaConfig | None",
         autogenerate: bool = True,
-        serena_config: "SerenaConfig | None" = None,
     ) -> "Project":
         project_root = Path(project_root).resolve()
         if not project_root.exists():

test/conftest.py

@@ -109,7 +109,7 @@ def start_default_ls_context(language: Language) -> Iterator[SolidLanguageServer
 
 def _create_default_project(language: Language) -> Project:
     repo_path = str(get_repo_path(language))
-    return Project.load(repo_path)
+    return Project.load(repo_path, serena_config=None)
 
 
 @pytest.fixture(scope="session")