Paragraph properties [#15a] [#15b] [#15c] [#15i] [#15p] [#15q]

This PR adds the following properties to Paragraphs:
  - Bidirectional text
  - Contextual spacing
  - Keeping lines of a paragraph on the same page
  - Mirroring indents
  - Supressing line numbers, auto hyphens and overlap
  - Auto adjusting the right indent
  - Auto adjustment of spacing between Latin and East Asian text
  - Auto adjustment of spacing between numbers and East Asian text
  - Disabling punctuation overflow
  - Enabling East Asian typography rules
  - Setting outline levels
  - Conditional formatting for paragraphs in table cells
  - Specifying which `div` tag a paragraph should be in when saving to HTML
  - Disabling snapping paragraphs to the document grid
  - Disabling widow control
  - Switching to character-level word breaks