* use wf-recorder instead of wl-screenrec
wl-screenrec does not support NVIDIA drivers as of now
* install wf-recorder and migration for it
* use wl-screenrec for non-nvidia and wf-recorder otherwise
* useless comment
* only use one of the screen recording features
Previously, `omarchy-update` used the timestamp of the most recent git
commit to determine which migrations are "new" and should be executed.
Unfortunately, that strategy can (and did) fail in certain scenarios. If
a migration was generated at time T1 but not merged until time T3, and
meanwhile omarchy's `master` branch was updated to a new release with
commit timestamp T2 (where T1 < T2 < T3), then anyone who runs
`omarchy-update` between T2 and T3 would end up with `last_updated_at`
equal to T2; thus, on their next `omarchy-update` it would fail to
detect the migration with timestamp T1 as a "new" migration that should
be executed.
This commit changes the strategy for detecting "new" migrations to avoid
that problem. Rather than recording the most recent commit's timestamp,
we record its SHA. Then, after pulling the new changes, we can leverage
`git diff --name-only --diff-filter=A $SHA.. migrations/*.sh`
to return precisely the list of migration files that were introduced by
our `git pull`. It doesn't matter if any of those migrations have a
timestamp that was earlier than the timestamp of the commit we started
on - we will always execute *every* migration that didn't exist before
our `git pull`!
