🔨 Rake tasks for yard and yard:junk

Rakefile

@@ -20,4 +20,24 @@ rescue LoadError
   end
 end
 
-task default: %i[test rubocop_gradual]
+begin
+  require "yard-junk/rake"
+
+  YardJunk::Rake.define_task
+rescue LoadError
+  task("yard:junk") do
+    warn("yard:junk is disabled")
+  end
+end
+
+begin
+  require "yard"
+
+  YARD::Rake::YardocTask.new(:yard)
+rescue LoadError
+  task(:yard) do
+    warn("yard is disabled")
+  end
+end
+
+task default: %i[test rubocop_gradual yard yard:junk]