Expose embed block creation function

[ChaosExAnima]

Is your feature request related to a problem? Please describe.
I would like a way to register new embed blocks simply via a public API. Currently, the only way to create a new embed seems to be replicating all related core code.

Describe the solution you'd like
I would like to see the function getEmbedBlockSettings exported to a public API.

Describe alternatives you've considered
As mentioned, so far the alternatives would be to replicate all functionality in getEmbedBlockSettings and getEmbedEditComponent, along with all dependencies. This would be very inefficient and not inherit any Core improvements automatically, requiring maintenance.

[youknowriad]

Seems fine to expose. Since it's possible to add a custom oembed provider, it should be possible to add a corresponding block quickly.

[LittleCoding]

Along with this exposing of create embed, it would be great to be able to call the embeds that use this method of creation as a React component. So an embed can be used as a editable field/area of custom blocks like MediaUpload.