feat(initial): added portable mfem build system

tools/install_bundle.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+"""Copy a build-tree MFEM prefix into a Meson/meson-python destination."""
+
+from __future__ import annotations
+
+import argparse
+import os
+from pathlib import Path
+import shutil
+
+
+def staged_destination(destination: Path) -> Path:
+    destdir = os.environ.get("DESTDIR", "")
+    if not destdir or not destination.is_absolute():
+        return destination
+    destination_text = os.fspath(destination)
+    relative = destination_text[len(destination.anchor) :].lstrip("/\\")
+    return Path(destdir) / relative
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--source", type=Path, required=True)
+    parser.add_argument("--destination", type=Path, required=True)
+    args = parser.parse_args()
+    destination = staged_destination(args.destination)
+    destination.mkdir(parents=True, exist_ok=True)
+    for child in args.source.iterdir():
+        target = destination / child.name
+        if child.is_dir():
+            shutil.copytree(child, target, dirs_exist_ok=True, symlinks=True)
+        else:
+            shutil.copy2(child, target, follow_symlinks=False)
+    print(f"Installed MFEM native bundle to {destination}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())