Fix bug that could cause the cursor to be positioned immediately to the left of the widget (within its margin) making it look like there was a space character in the buffer when there was not.
Add tests for math blocks.
Fixes#21.
* Contain language selection dialog in an element that can be scrolled, and automatically scroll it if needed when navigating the list with arrow keys
* Add support for more languages:
Clojure, Erlang, Golang, Lezer, Ruby, Shell, YAML
* Move prettier auto format settings for languages into Language() class
* Remove invalid import
* Fix bug that could cause auto formatting to fail for the last block.
Add tests for language auto detection and formatting.
* Fix broken tests
* Fix language auto detection on Safari Webkit which was broken
* Remove unnecessary wait time
* Set up Playwright and add first test
* Add npm run commands for running tests
Run tests in github actions
* Fix tests on non Mac environments
* Add method to HeynoteEditor class to set the buffer content
* Add more tests
* Set Github action job name