Yea, its a pretty common thing with most development tools. Just about all of them have template files for things like "new project" or "comment insertion", etc. At least that's been my experience over my 36 years of development. For example, both Microsoft Visual C++ and Embarcadero RAD Studio have that feature. Many other product do as well, so its not surprising it can be done here too.
Sometimes they are simply text files, other times XML, and sometimes proprietary but proprietary data files (DBs or otherwise) have become pretty unpopular with developers since we always want ways to make our job easier. LOL
Game development is a new area for me, I'm used to building low level system tools, utilities, and other applications. Leadwerks appears to be a nice platform for wetting my appetite with game dev.