fix: Remove the view blocking platform, layer cutting functionality broken and replace heart icon with check icon

[Phantom-VK]

Just was looking at the website, shared via a friend. I havent explored all the features yet as this software is still under development, but here are some issues mostly in "User Interface and Experience" category, which I think can be fixed for now. I havent explored code base, so I wont be pasting in code snippets here.

1. Remove view blockin platform under the 3D object.
   This platform blocks the user's ability to see the bottom portion of the object, which is important for a complete 360-degree analysis.

2. The "Layer" functionality does not work as it should logically.
   When activating the layer feature, the 3D object does not get cut in half to reveal its internal layers as intended. Instead, the object merely converts into a wireframe mesh, making it impossible to view the actual layered structure.

3. Replace the heart icon
   Current icon used for confirming a selction is a "Heart" icon, which is mostly used for "liking" or "favoriting" content. I suggest to use simple radio buttons for it.

[PouyanJay]

@Phantom-VK I am doing an attemnpt to address these. It's up to the maintainer to merge it to the main repo.

[PouyanJay]

@thebuggeddev I would like to pick up this issue