Remove internal library

[dagargo]

Since the project inception, not only was the idea providing the users a way to use Overbridge devices but also a way for others programmers to use the core functionalities.

But I don't think any functionality is used outside the project and having a library has some drawbacks. For instance, it makes it more difficult to distribute, package and debug. Besides, the project has grown to accommodate many features and use cases so the library idea is not needed any more, if it ever was.

However, I'm asking this to anyone interested before proceeding.

Though I intend(ed) to study the library for my own (rusty) experiments, a smaller/simpler codebase would also help in understanding what is going on. And for my purposes, I can always look at the releases that (still) contain them.

Also, I would just like to express my gratitude for all you've done for the Elektron Linux experience. Both Overwitch and Elektroid have been immensely helpful. So, thank you. ❤️

[dagargo]

I'm gonna leave this for later and release 2.2 without including this issue as I'm not even sure if this is a good idea.