Support browsing and managing files in application folders

[Hoshino-Yumetsuki]

What problem will this feature address?

It is very difficult to manage the application's files. The only faster way is to connect to the server via ssh and then operate the files. This makes it very troublesome to manually back up or change the file content.

:(

Describe the solution you'd like

Add a file management page to each application page, which can list all the files in the folder where the application is located, and can edit, copy and download the files (perhaps it can support compressed file download)

Describe alternatives you've considered

maybe have not

Additional context

No response

Will you send a PR to implement it?

No