add /prestiges

also fix inconsistency with checking groups

src/main/resources/plugin.yml

@@ -1,5 +1,5 @@
 name: Rankup
-version: 3.0-alpha.20
+version: 3.0-alpha.21
 main: sh.okx.rankup.Rankup
 author: Okx
 depend: [Vault]
@@ -21,6 +21,9 @@ commands:
     prestige:
         permission: rankup.prestige
         description: Prestige.
+    prestiges:
+        permission: rankup.prestiges
+        description: List all the prestiges.
 permissions:
     rankup.*:
         children:
@@ -31,6 +34,7 @@ permissions:
             rankup.reload: true
             rankup.ranks: true
             rankup.prestige: true
+            rankup.prestiges: true
     rankup.info:
         default: true
     rankup.rankup:
@@ -44,4 +48,6 @@ permissions:
     rankup.ranks:
         default: true
     rankup.prestige:
+        default: true
+    rankup.prestiges:
         default: true