Register permissions in Spigot plugin.yml (#2246)

bootstrap/spigot/src/main/resources/plugin.yml

@@ -8,4 +8,23 @@ api-version: 1.13
 commands:
   geyser:
     description: The main command for Geyser.
-    usage: /geyser help
+    usage: /geyser help
+permissions:
+  geyser.command.help:
+    description: Shows help for all registered commands.
+  geyser.command.advancement:
+    description: Shows the advancements of the player on the server.
+  geyser.command.dump:
+    description: Dumps Geyser debug information for bug reports.
+  geyser.command.list:
+    description: List all players connected through Geyser.
+  geyser.command.offhand:
+    description: Puts an items in your offhand.
+  geyser.command.reload:
+    description: Reloads the Geyser configurations. Kicks all players when used!
+  geyser.command.shutdown:
+    description: Shuts down Geyser.
+  geyser.command.statistics:
+    description: Shows the statistics of the player on the server.
+  geyser.command.version:
+    description: Shows the current Geyser version and checks for updates.