assets_for_text 1.0.0-alpha1

Initial release of a working module.

Known Issues

• Cache reload needed after adding or removing a library.
• Only supports adding libraries based on a class or ID, but `data-` is probably more common?
• Selecting the library is a real pain from a giant select list; recommend using Tomselect or core is trying to fix this too.
• No hook for other modules to use this yet; sure they could define the configuration but nah. I'll add this the second somebody wants this and/or make you a comaintainer.
• We might need to add settings kind of often? Like noticed webform in a test doing `drupalSettings` for `['webform']['dialog']['options']` to be `$this->configFactory->get('webform.settings')->get('settings.dialog_options')`