This uploads wallpapers, logos, desktop-files in seperate directories-(Solve- #340)

[pranav1698]

Checklist

• [x] I have read the Contribution & Best practices Guide and my PR follows them.
• [x] There is a corresponding issue for this pull request.
• [x] My branch is up-to-date with the Upstream master branch.
• [x] The unit tests pass locally with my changes (provide a screenshot or link for test)
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)

Short description of what this resolves:

After #336 is merged,

• The uploaded files array was empty
• The different uploading options were not stored in seperate repositories

Changes proposed in this pull request:

• The wallpapers, logos, zip-files are stored in separate directories

Fixes #340 The scope of this pr to store the different uploading options in separate directories This pr is a part of the pr #303 ; because it contained a lot of changes I am trying to break the changes with multiple pr's

[pranav1698]

For wallpaper: For logo: For zip-files: