[2.0.0-beta4] JSON schema examples property

Let's override the componentpluginmanager again in ui_patterns_library, and make it extends ui_patterns one

DONE:

• componentpluginmanager added with first draft of JSON schema examples property and otehr stuff
• split of templates (not in the scope of this issue, but let's do it anyway)

What do we do if there a not the same number of examples in props?

• We ignore missing examples? (current situation)
• We repeat the last example?
• We do a matrix? For example, 2 props, one with 2 examples, one with 3 examples: 3 stories.?

This branch also have commits about splitting library templates !

Splitting library templates task is moved to 📌 [2.0.0-alpha3] Split Library templates into smaller ones Active

Moved to beta1

See also ✨ [2.0.0-beta4] Add a stories specific discovery Needs work

Still working on it.

Testing with https://www.drupal.org/project/prototype → and not convinced because the results are not visually great.

Moved to beta2, with the related Library issues. However, we may cancel this change if the results don't match the added complexity.

Because we plan to extends the plugin manager, let's wait to see what will happen with the service decorator in 🐛 [2.0.0-beta2] plugin.manager.sdc conflict with Experience Builder Needs work