File Manager

[NGPixel]

### Tasks
- [x] Tree Browse
- [x] Create Folder
- [x] Rename Folder
- [ ] Duplicate Folder
- [ ] Move Folder
- [x] Delete Folder
- [x] Upload Files
- [x] Search in Folder
- [x] Create Page from Current Path
- [ ] Rename Page
- [ ] Duplicate Page
- [ ] Move Page
- [ ] Delete Page
- [ ] Rename Asset
- [ ] Delete Asset
- [ ] Move Asset
- [ ] Delete Asset
- [x] Copy Page / Asset URL
- [ ] Download Page
- [ ] Download Asset