[Feature Request]: Add the ability to set a maximum file size limit

[anotherlab]

Feature Description

It would be useful if you could configure Publii to provide a warning when you pick a file in the edit over X Mb in size. There should be a site setting that lets you set the maximum file size. The editor would check that limit when adding an image and the File Manager would check that limit when adding a file.

• Image sizes should be optimized for fast loading.
• Publii can fail to do a sync when using Git Repository when there are large files.
• Some hosts may have limits on file sizes, depending on the tier being used.

[raramuridesign]

This is actually a good idea, if you are using Cloudflare pages, the max file size is 25MB and the total files is 20.000.
So these hard limits would be useful.

In fact having a summary of total generated files would be neat as well.
Showing previous history in total files generated.

@dziudek

[anotherlab]

That 25 MB limit with Cloudflare pages is in part what prompted this. That and synching with the Git Repository server setting was failing with a vague timeout error message.

[raramuridesign]

Having some metrics of file usage would really be great

• total files
• x files larger than 5mb
• difference between last sync and current sync

Hope this will be considered.