Adds a description to permission signs

The description is displayed when right-clicking the sign, and can be used to fully describe the effects, without the player needing to understand permissions.

src/main/resources/strings.yml

@@ -35,6 +35,7 @@ en:
   SIGN_INFO: |
     &f---- &4Permission Sign&f ----
     &f| &bName: &7{Name}
+    &f| &bDescription: &7{Description}
     &f| &bPermission(s): &7{Permissions}
     &f| &bCost: &7{Cost}
     &f| &bDuration: &7{Duration}
@@ -78,6 +79,7 @@ nb-no:
   SIGN_INFO: |
     &f---- &4Tilgangsrettighetsskilt&f ----
     &f| &bNavn: &7{Name}
+    &f| &bBeskrivelse: &7{Description}
     &f| &bTilgangsrettighet(er): &7{Permissions}
     &f| &bKostnad: &7{Cost}
     &f| &bVarighet: &7{Duration}