Question about uploading theme to WordPress

Hi Folks,

Not entirely sure if i have come to the right place to post this question.

I would like to upload my theme to the WordPress.org themes section but a couple of requirements is not to include the register_taxonomy and register_post_type function.

This is what i have from the Theme Check plugin.

REQUIRED: The theme uses the register_taxonomy() function, which is plugin-territory functionality.
REQUIRED: The theme uses the register_post_type() function, which is plugin-territory functionality.

So how do i bypass this, i want a portfolio, sliders and other post types in my theme, do i have to create a plugin for this? Can i include plugins in my theme that are activated using the TGM plugin? Does the plugin have to be uploaded to the plugins area here on wordpress.org?

Kindly appreciate your feedback.

Best Regards