Move selections to a new layer

[kazcw]

Pull Request Description

Move selections to a new Vue component so that they don't interfere with clicking on edges.

Screen.Recording.2024-03-08.at.14.47.30.mov

Important Notes

• The new GraphNodeSelection components are drawn in a GraphNodeSelections container. They are created by the GraphNodes and teleported so that the node can set properties directly.

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• All code has been tested:
  • Unit tests have been written where possible.
  • If GUI codebase was changed, the GUI was tested when built using ./run ide build.