[FEATURE]: list and navigate sessions

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

if you list session using opencode sessions list the result is relative to directory u r in. which is a good thing. however, to list all sessions you hav to querying DB something like this:

sqlite3 -header -column ~/.local/share/opencode/opencode.db "
SELECT
    id,
    title,
    directory,
    datetime(time_updated/1000,'unixepoch','localtime') AS updated
FROM session
ORDER BY time_updated DESC;
"

This feature will helpful when having many projects / sessions. to navigate between sessions and close expired one.
so the command will be opencode sessions list -g -g for global and the result show at least title & directory.