Second level of action: `!gmail !u1`

In theory it is possible to build a more complex query for querying a particular search engine

As an illustration, let's say gmail example, where `!gmail hello` searches gmail for hello.

The url pattern of gmail, when there are multiple users are logged in gmail at the root url is https://mail.google.com/mail/u/0/#inbox, where in `mail/u/0/#inbox`:

- `mail` is a root prefix that does not seem to change across the mail app
- `u` is a prefix for saying there are multiple user accounts that are used on this browser and terminal (maybe, see next point)
- `0` is the local id of the stored user (probably in local storage etc). If you open your second inbox you'll see that number becoming 1
- `#inbox` is some sort of query param that is bound to the search input, but not just to simple search, to a more advanced boolean search in:inbox, or is:draft for #draft

This seems to be very similar on Google Drive too.

Therefore we can imagine a find queries such as:

- `!gm !u1 is:draft hello` searching on my gmail personal account for a hello draft message https://mail.google.com/mail/u/1/#search/in%3Adraft+hello
- `!drive !u0 type:pdf contract` searching my gmail professional account for contract of type pdf https://drive.google.com/drive/u/0/search?q=type:pdf%20contract

The only new thing in these examples, is the second level of bang `!`, which would be the thing that has to be investigated and defined in feature design.