added Zeus file explorer

[y0014984]

Merging this Pull Request will adda file explorer feature to the Zeus interface. Currently it only displays the file contents but it should be expanded to allow:

• [ ] renaming files/directories
• [ ] adding files/directories
• [ ] removing files/directories
• [x] changing content of files
• [ ] changing permissions of files/directories
• [ ] set the "is code" flag for files
• [ ] enable/disable encryption for files

[nomisum]

maybe add executing code to context menu as well?

edit: use case hacker activity or other messages plopping up for users to react to