Offer diskusage functionality

[PanderMusubi]

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Checklist

• [X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one feature request.
• [X] I have read and understood the contribution guidelines.
• [X] I optionally donated to support the Fossify mission.

Feature description

Functionality offered by https://github.com/IvanVolosyuk/diskusage is very useful for graphically finding files and directories that take up a lot of disk space and can be removed. See https://github.com/IvanVolosyuk/diskusage and https://f-droid.org/en/packages/com.google.android.diskusage/

Personally, I use it a lot. However, the maintenance of this app is minimal. Perhaps it is better to have File-Manager offer something similar. Especially deleting (trash can) and moving files could be handled by existing functionality.

Why do you want this feature?

Quickly find large files and directories to delete or move to other storage to prevent the device to run out of free space or become slow.

Additional information

https://github.com/orgs/FossifyOrg/discussions/230