Add Apps Script for syncing 판매용SW Package data to DB sheet

- clasp project bound to existing Google Sheet
- syncPackageToDB: maps columns between 판매용SW and DB sheets, updates matching rows by 보여질순서 key
- Handles merged 분야 column fill-down, 금액/연 calculation (단가×copy수)
- Highlights updated cells in yellow
- Includes listSheets utility and onOpen menu

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

appsscript.json

@@ -0,0 +1,10 @@
+{
+  "timeZone": "Asia/Seoul",
+  "dependencies": {
+  },
+  "exceptionLogging": "STACKDRIVER",
+  "runtimeVersion": "V8",
+  "executionApi": {
+    "access": "MYSELF"
+  }
+}