No, they are not located together. (
The TownTypesInfo.xdb file is in the \GameMechanics\RefTables\ folder.
The file is divided into blocks, by faction. It contains settings for hero path textures, faction-specific structures, some moat settings, and resources for the warehouse.
What a nightmare, as if it wasn't possible to put all the buildings in one file. Anyway, thank you very much, I found everything).