Implemented "muted" command

This lists accounts the logged in user has muted. It is useful for
creating regular backups.

toot/api.py

@@ -521,6 +521,10 @@ def unmute(app, user, account):
     return _account_action(app, user, account, 'unmute')
 
 
+def muted(app, user):
+    return _get_response_list(app, user, "/api/v1/mutes")
+
+
 def block(app, user, account):
     return _account_action(app, user, account, 'block')
 

toot/commands.py

@@ -493,6 +493,11 @@ def unmute(app, user, args):
     print_out("<green>✓ {} is no longer muted</green>".format(args.account))
 
 
+def muted(app, user, args):
+    response = api.muted(app, user)
+    print_acct_list(response)
+
+
 def block(app, user, args):
     account = api.find_account(app, user, args.account)
     api.block(app, user, account['id'])

toot/console.py

@@ -704,6 +704,12 @@ ACCOUNTS_COMMANDS = [
         ],
         require_auth=True,
     ),
+    Command(
+        name="muted",
+        description="List accounts the given account muted",
+        arguments=[],
+        require_auth=True,
+    ),
     Command(
         name="block",
         description="Block an account",