Disabled Ctrl+V Image base 64

[renanfrancisodasilva]

Checklist

• I've searched through the plugins to make sure this feature isn't already available, or think it shouldn't require a plugin.
• I've searched through the current issues to make sure this feature hasn't been requested already.
• I agree to follow the Code of Conduct that this project adheres to.

Motivation

It is not possible to prevent the user from copying an external image and pasting it into the Textarea, generating base64

Suggested solution

Possibility to disable the following events:
insertImage,
insertImagesAsDataURL,
insertImagesOrCallback

When removing the class from their key, the behavior no longer occurs

Alternatives considered

Here we remove the keys from the codes, but it could be an option/configuration

[DennisSuitters]

Summernote hooks into the Browsers native Javascript functionality to perform insertion tasks. I'm not sure, but I think if the option (if there is one) to prevent disabling image insertion, which should also cover drag/drop and copy/paste which invokes the Summernote functionality checks if it's enabled or disabled prevents or allows the functionality to happen, or stop the native browser function from happening. If you want to make the changes if you're able, I'll test and merge. However, I'm currently working on a Potato Harvester, 10hrs a day most days at the moment, so I can't promise when I can test and merge.