Improve command permission lookups

This allows us to append to the vanilla permission check object to avoid having to look into a map.

This also fixes non vanilla commands from technically being able to be skipped through permissions.

paper-server/patches/sources/net/minecraft/commands/CommandSourceStack.java.patch

@@ -9,11 +9,10 @@
      public static final SimpleCommandExceptionType ERROR_NOT_PLAYER = new SimpleCommandExceptionType(Component.translatable("permissions.requires.player"));
      public static final SimpleCommandExceptionType ERROR_NOT_ENTITY = new SimpleCommandExceptionType(Component.translatable("permissions.requires.entity"));
      public final CommandSource source;
-@@ -65,6 +_,8 @@
+@@ -65,6 +_,7 @@
      private final Vec2 rotation;
      private final CommandSigningContext signingContext;
      private final TaskChainer chatMessageChainer;
-+    public java.util.Map<Thread, com.mojang.brigadier.tree.CommandNode> currentCommand = new java.util.concurrent.ConcurrentHashMap<>(); // CraftBukkit // Paper - Thread Safe Vanilla Command permission checking
 +    public boolean bypassSelectorPermissions = false; // Paper - add bypass for selector permissions
  
      public CommandSourceStack(
@@ -49,19 +48,7 @@
      public CommandSourceStack withRotation(Vec2 rotation) {
          return this.rotation.equals(rotation)
              ? this
-@@ -393,9 +_,44 @@
- 
-     @Override
-     public boolean hasPermission(int level) {
-+        // CraftBukkit start
-+        // Paper start - Thread Safe Vanilla Command permission checking
-+        com.mojang.brigadier.tree.CommandNode currentCommand = this.currentCommand.get(Thread.currentThread());
-+        if (currentCommand != null) {
-+            return this.hasPermission(level, org.bukkit.craftbukkit.command.VanillaCommandWrapper.getPermission(currentCommand));
-+            // Paper end - Thread Safe Vanilla Command permission checking
-+        }
-+        // CraftBukkit end
-+
+@@ -396,6 +_,32 @@
          return this.permissionLevel >= level;
      }