javadocs fixes

Co-authored-by: chris <github@onechris.mozmail.com>

api/src/main/java/org/geysermc/geyser/api/command/Command.java

@@ -104,7 +104,7 @@ public interface Command {
     boolean isBedrockOnly();
 
     /**
-     * @deprecated this method will always return an immutable list
+     * @deprecated this method will always return an empty immutable list
      */
     @Deprecated(forRemoval = true)
     @NonNull
@@ -166,7 +166,8 @@ public interface Command {
 
         /**
          * Sets the permission node and its default value. The usage of the default value is platform dependant
-         * and may or may not be used. For example, it may be registered to an underlying server.<br><br>
+         * and may or may not be used. For example, it may be registered to an underlying server.
+         <p>
          * Extensions may instead listen for {@link GeyserRegisterPermissionsEvent} to register permissions, which
          * should be used if the same permission is required by multiple commands.
          *

api/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserDefineCommandsEvent.java

@@ -33,7 +33,7 @@ import java.util.Map;
 
 /**
  * Called when commands are defined within Geyser.
- * <br><br>
+ * <p>
  * This event allows you to register new commands using the {@link #register(Command)}
  * method and retrieve the default commands defined.
  */

api/src/main/java/org/geysermc/geyser/api/event/lifecycle/GeyserRegisterPermissionsEvent.java

@@ -30,7 +30,7 @@ import org.geysermc.geyser.api.util.TriState;
 
 /**
  * Fired by anything that wishes to gather permission nodes and defaults.
- * <br><br>
+ * <p>
  * This event is not guaranteed to be fired, as certain Geyser platforms do not have a native permission system.
  * It can be expected to fire on Geyser-Spigot and Geyser-Standalone.
  * It may still be fired on other platforms due to a 3rd party.

core/src/main/java/org/geysermc/geyser/command/GeyserCommand.java

@@ -188,7 +188,7 @@ public abstract class GeyserCommand implements org.geysermc.geyser.api.command.C
     /**
      * Registers this command to the given command manager.
      * This method may be overridden to register more than one command.
-     * <br><br>
+     * <p>
      * The default implementation is that {@link #baseBuilder(CommandManager)} with {@link #execute(CommandContext)}
      * applied as the handler is registered to the manager.
      */