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

Makefile

@@ -0,0 +1,32 @@
+SHELL := /bin/bash
+
+INPUT ?= examples/sample.whl
+OUTPUT ?= output
+
+.PHONY: help repack rebuild native clean
+
+help:
+	@echo "EcoArk HarmonyOS Wheel Pipeline"
+	@echo ""
+	@echo "Usage:"
+	@echo "  make repack   INPUT=path/to/pkg.whl   — Repack a pure-Python wheel for HarmonyOS"
+	@echo "  make rebuild  INPUT=path/to/pkg.whl   — Trigger native rebuild entry (stub)"
+	@echo "  make clean                            — Remove output/"
+	@echo ""
+	@echo "Examples:"
+	@echo "  make repack   INPUT=some_package.whl"
+	@echo "  make rebuild  INPUT=some_native.whl"
+
+repack:
+	python3 wheel_pipeline.py "$(INPUT)" --output-dir "$(OUTPUT)" --force-repack
+
+rebuild:
+	python3 wheel_pipeline.py "$(INPUT)" --output-dir "$(OUTPUT)" --target-os harmonyos --arch arm64
+
+native:
+	python3 wheel_pipeline.py "$(INPUT)" --output-dir "$(OUTPUT)" --target-os harmonyos --arch arm64
+
+clean:
+	rm -rf "$(OUTPUT)"
+	mkdir -p "$(OUTPUT)"
+	touch "$(OUTPUT)/.gitkeep"