List journal filenames in root handle

[dangra]

Attempt to fix #124

After creating a db and set WAL journal mode, the mounted dir listing is:

$ ls dbs/ -lh
total 0
-rw-rw-rw- 1 daniel daniel 4.0K Oct 19 19:36 state.db
-rw-rw-rw- 1 daniel daniel  32K Oct 19 19:36 state.db-shm
-rw-rw-rw- 1 daniel daniel  37K Oct 19 19:36 state.db-wal

Passes tests:

$ go test -p 1 -timeout 5m ./fuse -journal-mode wal
ok      github.com/superfly/litefs/fuse 1.707s
$ go test -p 1 -timeout 5m ./fuse -journal-mode delete
ok      github.com/superfly/litefs/fuse 1.577s

[benbjohnson]

Thanks, @dangra. It doesn't look like CI is running for external PRs but the tests are passing locally. 🙏