Edit Code Macros in place with BlockNote

The BlockNote editor now displays the standalone Code Macro calls (as opposed to the inline ones) as code blocks, styled like in view mode. Edit the code in place, and pick its language from the selector shown when hovering the block, which highlights the code accordingly. The other parameters of the macro are kept on save.

Code blocks inserted from the slash menu are now saved as Code Macro calls instead of verbatim blocks. Inline Code Macro calls, or calls taking their code from the source parameter, are still edited through the Macro edit modal.