huge refactor of plugin system

scripts/bootstrap.py

@@ -1057,6 +1057,7 @@ def main() -> int:
     def _ensure_repo_available() -> bool:
         """Prompt for a clone location when running outside the repository."""
         nonlocal repo_root, script_dir, is_in_repo
+        repo_dir_name = "Medios-Macina"
 
         # If we have already settled on a repository path in this session, skip.
         if is_in_repo and repo_root is not None:
@@ -1099,6 +1100,14 @@ def main() -> int:
                 print("Error: Could not determine installation path.", file=sys.stderr)
                 return False
 
+            if install_path.exists() and install_path.is_dir() and not _is_valid_mm_repo(install_path):
+                try:
+                    has_contents = any(install_path.iterdir())
+                except Exception:
+                    has_contents = False
+                if has_contents:
+                    install_path = install_path / repo_dir_name
+
         except (EOFError, KeyboardInterrupt):
             return False