Popup on hover with data

• when users hover over the Line

  • we need to see a popup
    • which contain some data inside it

• for the positioning of the popup:

  • just use an online library like https://floating-ui.com/
    • and follow their docs.

make sure to add also the arrow, and style all the things (docs are ok for doing that)

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⚠️ EDIT:

in a change I created a mini-bug that don't make the angle be visible

now is solved in #21