feat(geodata): add standard source presets (#6504)

* feat(geodata): add standard source presets

Expose the existing geofile allowlist to the Geodata editor so administrators can configure the supported scheduled downloads without copying URLs manually

Tested with npm run test, npm run lint, npm run typecheck, npm run format:check, and go test ./internal/web/service ./internal/web/controller -run '^(TestStandardGeodataSources|TestGeodata)' -count=1

Assisted-by: OpenCode:openai/gpt-5.6-terra (mostly)

* fix(geodata): preserve custom source entries

Add missing standard sources instead of replacing existing custom entries.

Assisted-by: OpenCode:openai/gpt-5.6-terra (mostly)

internal/web/translation/fa-IR.json

@@ -221,6 +221,7 @@
       "geodataOutbound": "دانلود از طریق خروجی (اختیاری)",
       "geodataFile": "نام فایل",
       "geodataAddFile": "افزودن فایل",
+      "geodataUseStandardSources": "استفاده از منابع استاندارد",
       "geodataSaveRestart": "ذخیره و ری‌استارت Xray",
       "geodataConfirmTitle": "تنظیمات geodata ذخیره شود؟",
       "geodataConfirmContent": "قالب پیکربندی Xray به‌روزرسانی و Xray ری‌استارت می‌شود.",