Feat: Add DBSettings.properties example

CityDoctorParent/Extensions/CityDoctorGUI/DBSettings.properties

+#Embedded database configuration
+#Mon Jan 19 13:16:58 CET 2026
+#database.attemptFallback=true
+#database.connectionPoolSize=22
+#database.debugMode=false
+#database.directory=\\database\\
+#database.inMemoryMode=false
+#database.name=cd_db
+#database.tempMode=false