Editor: Multi-Line Paste always results in code block

[ericvicenti]

When pasting multiple lines of text from VSCode into the editor, a code block is always created, even when the text does not resemble code

Multi-line paste should result in multiple text blocks being created

Eventually we will want to handle markdown when pasting, and this is the first step in resolving that

[iskaktoltay]

Tiptap's code block extension has a prosemirror plugin that checks on paste if the clipboard data contains vscode metadata so it is inserted as a code block. Do you want to remove that plugin? @ericvicenti