[💡 Feature]: Calculate distance of updated project item position

[christian-bromann]

Is your feature request related to a problem?

Currently if we update the reference location of the page item we find a line that is most similar to the code line it had before. This is also true if we delete that line. That can cause a change to the code reference that has almost nothing to do anymore with the original reference.

Describe the solution you'd like.

Once we found the new reference location we should calculate the distance of it again and at a certain threshold remove the reference if the code lines are just too different.

Describe alternatives you've considered.

n/a

Additional context

n/a

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