Organize commands into subcommands (#430)

• Organize commands under groups
• Update f() names used as commands
• Rename commands name
• Move wot/wot to wot.status

Close #430 (closed).

silkaj/blockchain/difficulty.py

@@ -30,7 +30,7 @@ from silkaj.constants import ALL
 
 
 @click.command(
-    "diffi",
+    "difficulty",
     help="Display the current Proof of Work difficulty level to generate the next block",
 )
 def difficulties() -> None: