* Add links to single routes in main index woocommerce/woocommerce-blocks#4473
* Footer
* Feedback template
* Remove footer from existing MD files
* Add doc footer script
* Apply script to all docs
* Fix examples
* add doc for feature flag and experimental interfaces
* add new doc to TOC
* update pull request template to include checklist item for experimental/feature flag items
* tweak wording for experimental prefix
* fix bad formatting of bold for lines
* fix double slash in url
* add missing sentence case
* remove account signup as that is not included in Cart and Checkout block logic.
* Fix typo