OpenCode's `session.deleted` does not fire under the conditions expected by memelord's `hookSessionEnd`

[madisonbullard]

memelord runs hookSessionEnd on Claude Code's SessionEnd hook (docs), which runs for the following reasons:

Reason	Description
clear	Session cleared with /clear command
logout	User logged out
prompt_input_exit	User exited while prompt input was visible
bypass_permissions_disabled	Bypass permissions mode was disabled
other	Other exit reasons

These are different conditions compared to OpenCode's session.deleted, currently leveraged by this repo, which corresponds to the "Delete session" user input.

AFAIK there isn't a good corollary to SessionEnd in OpenCode. The (admittedly less-than-ideal) approach I went for in my PR is to spawn a process on session.idle that runs the SessionEnd behavior after 90 seconds of idling. Sort of a best approximation of the user ending the session entirely.