Image block and code block toolbar renovation

The design team has changed the toolbars' position, which are located outside the image block/code block, move to the top right corner of the blocks, and it will appear when hovered over. Please focus solely on the UI redesign for this issue. We don't need to address any functional discrepancies at this stage. Let's ensure the user interface aligns with the updated design specifications. If you encounter any functional issues while implementing the UI changes, you can note them, but there's no need to resolve them in this phase. Original design👇

Newest design👇 code block link

Image block link