[Feature] Add default Trinity database config

**Is your feature request related to a problem? Please describe.**
Default database config is empty now. However, majority of the users use databases with default trinity config (localhost, 3306, trinity, trinity, world).

**Describe the solution you'd like**
Default trinity database config, should be default config in the WDE

No file, test, or entry point is named in the issue. Locate where WDE's empty database defaults are defined, then verify that the default Trinity settings are localhost, port 3306, database trinity, user trinity, and world database, with the application using those values on a fresh configuration.

Written by the indexing model from the issue text.