Set FPS limit from the Blender editor

After reading this in the [forums](https://forums.armory3d.org/t/set-limit-framerate-ln-for-get-fps/4286/9) and following this [issue](https://github.com/armory3d/iron/issues/107), I think the end user should be setting the FPS cap from `Output -> Frame Rate`:


While I'll be investigating and giving it a try on my own I'll appreciate if someone can point me out which source files I can read to speed up and see what I can do.

Start by tracing how Blender's Output → Frame Rate setting reaches the engine, using the linked Armory issue #107 and forum discussion as context. The work is done when an end user's Blender frame-rate setting controls the runtime FPS cap; the issue names no source files or tests, so locating the integration points is part of the task.

Written by the indexing model from the issue text.