Can not find any proper example.

The editorService has a method for opening it in an infinite editor, don't know how much else you would need to implement yourself though

I create a section. in yellow mark I want to show ... mark and a create button. when someone click on create I wan to show document type editor https://cdn.discordapp.com/attachments/1184441536906276915/1184461566670798909/image.png?ex=658c0ecb&is=657999cb&hm=5f8c6d4988253d7bc238105f2b401cb5f4dc131d0d70f2e21ead2e56294b64d1&

While it is possible it is a massive amount of work and I would highly recommend you do not do it. If the content doesn't have to be Umbraco nodes then you could get going pretty quickly with Umbraco UI Builder

Umbraco UI builder gives error

You are trying to do something that's not really supported. You can do pretty much anything in Umbraco as it's all AngularJS that you can inject views. etc into to fit your needs. However what you are trying to do is not something that's intended. so you would have to do a lot of work yourself to implement large parts of what already exists in the content section. I would highly recommend you rethink the need of putting this into a seperate section