Add non launching sub commands

[ManyTheFish]

Is your feature request related to a problem? Please describe.
meilisearch command lines are messy and doesn't allow to add non-launching commands

Describe the solution you'd like
Have several sub command with options instead of lot of options:

like meilisearch run ...., meilisearch import ....

Describe alternatives you've considered
..

Additional context
Dumps and snapshots introduced the possibility to run a meilisearch command without launching meilisearch