feat: Add animations to the tooltip

[Valer100]

This PR makes the tooltip fade in when it's showing and fade out when it's hiding. The animations are enabled by default, but they can be disabled by setting the animations argument to False.

Here is a demo:

https://github.com/user-attachments/assets/defa0eac-4d93-4df4-8456-10fba183a7f0