Register permissions in Spigot plugin.yml (#2246)

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

@@ -9,3 +9,22 @@ commands:
   geyser:
     description: The main command for Geyser.
     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.