Feature: Count of frames and windows a bookmark holds

Hi,

You've a great collection of Emacs packages, I'm currently using `org-ql` and
`org-super-agenda`, and I plan to use Burly once tab support get implanted.
Thank you!

`File` column in `*Bookmark List*` buffer is useless when it comes to window and
frame configurations. What about make use of it somehow to list what each
Burly's bookmarks are about. I mean something like the count of frames, windows
and tab a bookmark holds.

If that not possible, then bookmark annotation might be a way to handle this. Or
maybe append this information to a bookmark name; like `Burly [1F2W]: foo`, here
`1F2W` means one frame and two windows. The total of windows are from all frames
to not make it complex. Maybe use Unicode characters instead of `F` and `W`
characters.

**Examples:**

``` text
% Bookmark File
----------------------------------------------------------------------
normal_bookmark /tmp/a/b.txt
Burly [1F3W]: foo -- Unknown location --
Burly [4F10W]: bar -- Unknown location --
Burly [1T2W]: baz -- Unknown location --
...
Burly: qux 1 frame(s); 2 window(s)
Burly: quux 0 frame(s); 5 window(s)
...
```

**Why?**

These kind of metadata help to know what to expect when opening a bookmark.

Thanks!