SQLClient exists as a wrapper around SQL IPC to provide a bit friendlier
interface for clients to deal with. Though right now, it mostly forwards
values as-is from IPC to the clients. This makes it a bit verbose to add
values to IPC responses, as we then have to add it to the callbacks used
by all clients. It's also a bit confusing seeing a sea of "auto" as the
parameter types for these callbacks.
This patch moves these response values to named structures instead. This
will allow adding values without needing to simultaneously update all
clients. We can then separately handle the new values in interested
clients only.
Currently, cookies are ephemeral and only survive for the lifetime of
Browser instance. This will make Browser instead store cookies in a SQL
database for persisted access.
