Provide rendered content as markdown via token

It would be useful to provided the rendered content as markdown via a replacement token.

Examples:

[node:markdownify]
[node:markdownify:my_viewmode]

The first would render the current default viewmode as markdown. The second would render a custom view mode.

The functionality would be useful in the context of AI, because replacement tokens are used a lot in prompts.

Example (using https://www.drupal.org/project/token_entity_render/ → ):