no issue
- `cleanBasicHtml` has been extracted to an external package so that it can be used inside the extracted `@tryghost/kg-parser-plugins` package server-side
refs https://github.com/TryGhost/Ghost/issues/9724
- `clean-basic-html` was being overzealous with it's empty element removal, often contenteditable (especially when pasting) will result in HTML such as `<span> </span>` which was being completely removed
- if an empty element has any spaces in it, replace the element with a textNode containing a single space
refs https://github.com/TryGhost/Ghost/issues/9724
- added `{{koenig-basic-html-input}}` component
- uses a stripped down version of Koenig
- supports all inline formatting that Koenig supports
- supports inline text expansions
- supports inline key commands
- limited to a single paragraph
- serialises and deserialises from HTML rather than mobiledoc
- updated `{{koenig-caption-input}}` to use `{{koenig-basic-html-input}}`
- updated image and embed cards to calculate word counts correctly for html captions
- bumped Spirit dependency to fix styling of toolbars within the editor canvas
- fixed positioning in toolbar components to account for `parentElement` not necessarily being the closest element to position against
