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>

pyrightconfig.json

@@ -0,0 +1,14 @@
+{
+  // Pylance/Pyright 設定：用來指定 Python 語言等級與檢查行為
+  // 注意：這是正確的位置，VS Code 設定中沒有 `python.analysis.pythonVersion` 此鍵
+  "pythonVersion": "3.11",
+  "typeCheckingMode": "basic",
+  "diagnosticSeverityOverrides": {
+    // 若已在 .vscode/settings.json 關閉這兩者，可移除以下兩行
+    "reportMissingImports": "none",
+    "reportMissingModuleSource": "none"
+  },
+  "executionEnvironments": [
+    { "root": ".", "pythonVersion": "3.11" }
+  ]
+}