feat: initial EcoArk HarmonyOS wheel pipeline skeleton

- wheel_pipeline.py: CLI entry point for repack/rebuild flow
- pipeline/detect.py: detect pure vs native extension wheels
- pipeline/repack.py: repack pure-Python wheels with harmonyos_arm64 tag
- pipeline/rebuild.py: native wheel rebuild entry (stub for OHOS NDK)
- pipeline/cli.py: argument parsing and orchestration
- Makefile: convenience targets (repack, rebuild, clean)
- README.md: documentation with usage and limitations
- examples/gen_test_wheels.py: test wheel generator
- output/: output directory for generated wheels

pipeline/repack.py

@@ -0,0 +1,30 @@
+import zipfile
+import os
+import shutil
+
+
+def repack_wheel(wheel_path: str, output_dir: str) -> str:
+    basename = os.path.basename(wheel_path)
+    name_parts = basename.split("-")
+
+    if len(name_parts) >= 4:
+        wheel_name = "-".join(name_parts[:-3])
+        version = name_parts[-3]
+        pure_tag = f"{name_parts[-2]}-{name_parts[-1]}"
+    else:
+        wheel_name = name_parts[0]
+        version = "0.0.0"
+        pure_tag = "none-any"
+
+    harmony_tag = f"{wheel_name}-{version}-py3-none-harmonyos_arm64.whl"
+    output_path = os.path.join(output_dir, harmony_tag)
+
+    os.makedirs(output_dir, exist_ok=True)
+
+    with zipfile.ZipFile(wheel_path, "r") as zin:
+        with zipfile.ZipFile(output_path, "w", zipfile.ZIP_DEFLATED) as zout:
+            for item in zin.infolist():
+                data = zin.read(item.filename)
+                zout.writestr(item, data)
+
+    return output_path