I would like to start an incremental search feature.
I think the best place would be the existing find-and-replace package (because
some of the needed functions are already there).
I have created a basic new package based on https://atom.io/docs/v0.71.0/your-first-package
But what do I have to do to adapt an existing package.
I have checked out the source code from GitHub I can make changes, I can even open that directory in “Dev Mode” but “loading” the package (after simply adding a menu item) does not alter the menu.