* Add support for injecting the text selection into Anki cards
* Add selection-text
* Upgrade to add {selection-text}
* Update descriptions
* Update test data
* Add TemplateRendererMediaProvider to abstract media-related functionality
* Update representation of injected media
* Update templates
* Update upgrade file
* Update tests
* Update test data
* Force media to be an object
* Update test data
* Update how glossary text is formatted
* Update structured content and image generation
* Pass root data to _createStructuredContentGenerator
* Implement media URLs
* Update documentation
* Update options util
* Apply styles to content
* Improve HTML normalization
* Update DatabaseVM.fetch function
* Update test
* Update test data
* Update test data for valid-dictionary1
* Use valid-dictionary1 instead of valid-dictionary2
* Update test data
* Remove test of valid-dictionary2
* Remove valid-dictionary2 data
* Add part of speech info to headwords
* Expose parts of speech to Anki template rendering
* Expose parts of speech
* Update pitch accent categories
* Update docs
* Add part-of-speech
* Update options and tests
* Update markers
* Update test data
