2.1.0: New default command that is better than obsidian built-in

• Add a new default transform that is better than Obsidian built-in.
  • The default transform will convert html to markdown using turndown.
  • Obsidian's built-in paste function also uses turndown, but it doesn't use the turndown-plugin-gfm plugin, which means that it doesn't support converting html tables to markdown tables, html task lists to markdown task lists, etc.
• Custom transforms can now access turndown service via the second argument passed to the transform function. (See https://github.com/kxxt/obsidian-advanced-paste#advanced-utilities) for more details.