Initial commit: Lunar calendar converter project

- Add lunar calendar astronomical calculation engine (lunar_calendar.py)
- Add converter utilities for solar/lunar date conversion
- Add historical era name conversions (chrono_converter.py, converter_with_eras.py)
- Add FastAPI REST API for date conversion services
- Add age calculator using lunar calendar
- Add batch generation script for lunar calendar JSON data
- Add project documentation (CLAUDE.md, pyproject.toml)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

generate_lunar_calendar_json.py

@@ -0,0 +1,29 @@
+import os
+from multiprocessing import Pool
+from pathlib import Path
+from lunar_calendar import LunarCalendar
+
+def process_year(year, output_dir):
+    try:
+        cal = LunarCalendar(year)
+        out_file = output_dir / f"{year}.json"
+        # 如果不想覆寫，再加個 exists() 檢查
+        if not out_file.exists():
+            cal.save_json(str(out_file))
+            print(f"完成，已輸出：{out_file}")
+        else:
+            print(f"跳過，檔案已存在：{out_file}")
+    except Exception as e:
+        print(f"處理 {year} 時出錯：{e}")
+
+def main():
+    output_dir = Path('lunar_json')
+    output_dir.mkdir(parents=True, exist_ok=True)
+
+    # years = range(1851, 2149)
+    years = range(1, 2149)
+    with Pool() as pool:
+        pool.starmap(process_year, [(y, output_dir) for y in years])
+
+if __name__ == "__main__":
+    main()