Change library path to follow common theme on other popular modules

Problem/Motivation

This module currently expects the library to be stored under libraries/ckeditor/plugins/find. Other modules like Webforms, FakeObjects and Anchor Link are about to "standardize" a bit and store their plugins under libraries/ckeditor.PLUGINID.

See e.g. ✨ Store plugin in libraries/ckeditor.fakeobjects Closed: won't fix and 🐛 Adjust composer.libraries.json to match webform standards and prevent webform issues Closed: won't fix .

It would be great, if this module would also follow that trend and store the plugin under libraries/ckeditor.find

Proposed resolution

I'm opening an issue fork and provide a merge request for this.