Add tooltip for TFM generation checkbox in search

[erdembayar]

Impact

Other

Describe the bug

In the selection below, it would consider any of net5.0, net6.0, net7.0, net8.0, and netcoreapp2.0 for filtering. filter =any(net5.0, net6.0, net7.0, net8.0) && (netcoreapp2.0). I think we need to have a tooltip to clarify this behavior; otherwise, it's not obvious at initial look, hard for customers to decipher and understand how this generation selection works.

[erdembayar]

cc @advay26

[advay26]

We can add a tooltip that says something like "Selecting .NET will show you packages compatible with any of the individual frameworks within the .NET generation."