[Feature-Request]Complete Copy/Cut/Paste for requests

**Is your feature request related to a problem? Please describe.**
- search for some request (e.g. *myrequest*) in left browser panel
- you want to move the found request in a subfolder, which doesn't match the search pattern (so, it is not visible in the search results)
- conversely, without using search, assume you have a lot of saved requests, so drag and drop is an uncomfortable option if the source request and the destination folder are not close enough

**Describe the solution you'd like**
There is already the 'Copy as CURL' button in the request context menu... Just add a Copy (and a Cut) button as well, and a Paste button in the context menu of folders

The request and folder context menus, including the existing “Copy as CURL” action, are the entry points mentioned. Start by locating those menus; done means requests offer Copy and Cut, folders offer Paste, and the workflow works when searching or when source and destination folders are far apart.

Written by the indexing model from the issue text.