feat: add the block's type as a CSS class to the block's root SVG

[CodeMaverick2]

Issue -> #8268

Fixes #8268

Description

This PR adds the prototypeName as a CSS class to the SVG group element of each block in the BlockSvg constructor. This enhancement allows for easier styling and identification of blocks based on their prototype.

Changes

• Modified the BlockSvg constructor to add the prototypeName as a CSS class to this.svgGroup_ using dom.addClass().

Benefits

• Improved block identification in the DOM
• Enhanced styling capabilities for specific block types

This change is backwards-compatible and provides a hook for future enhancements or debugging.

[BeksOmega]

Based on the other PR for this issue, I think this is going to fail some unit tests when the prototypeName doesn't exist. Could you wrap this in a check that it exists before trying to apply it?

[BeksOmega]

Looks great! Once this passes CI I'll get it merged =)

[CodeMaverick2]

@BeksOmega Sure, If any changes needed do tell me