Perf - possible improvement

[Paul Delafosse]

Opening the database:
Opening the database on start is quite slow.
We could probably spawn and iced subscription and send command history when it's ready.
Or maybe try to switch to a simpler solution like a plain text file or some binary format in $XDG_CACHE_DIR

Fetching db entries:

While opening the db is slow, fetching entries is fast.

Icon lookup:

I think because of glob patterns, this is completely random, we need to fetch in the background via iced messages.