More command cleanup

src/restic_compose_backup/commands/snapshots.py

@@ -1,4 +1,5 @@
 from .base import BaseCommand
+from restic_compose_backup import restic
 
 
 class Command(BaseCommand):
@@ -6,4 +7,7 @@ class Command(BaseCommand):
     name = "snapshots"
 
     def run(self):
-        print("Snapshots!")
+        """Display restic snapshots"""
+        stdout, stderr = restic.snapshots(self.config.repository, last=True)
+        for line in stdout.decode().split('\n'):
+            print(line)