GSOC2023-ShubhGaur: under Windows hidden files/junctions are listed and accessing leads to failure/crash

[gisi90]

System Windows 10:
Filepicker lists hidden (system) folders/links on C: or D:. Accessing files/junction like "Dokumente and Einstellungen" cannot be accessed and leads to a crash:

Solution: only show norman/non-hidden files that the user also can see in the Fileexplorer of the system.

[github-actions]

Thank you 🙏🏻 for submitting your first issue to fs_filepicker

[sratslla]

For Linux, we can remove the file starting with "." as that is the general convention. For Windows do you have any idea what can we do? Also, we will have to import os to check which operating system we are currently on.