- export diagram
* add a diagram export dialog where you can choose the file name
and download type (code, png, pdf, ...)
* set default download type to code
* open file save dialog via menu or Ctrl+S (or Meta+S for Mac)
- import diagram
* similar to [draw.io](https://app.diagrams.net)
* open a PlantUML diagram image, use metat data to get diagram code
and load this diagram (Note: meta data is currently only supported
by PNG and SVG diagram files)
* support drag&drop
* add diagram import dialog
- since three are now multiple options/action -> create a little
editor menu
- add documentation (including gif examples)
- typing `<:` will start the emoji auto complition inside the plantuml editor
- for the sake of simplicity the emoji preview of the completion documentation will fetch the image from the original github repository (not plantuml). The reason is that the images (SVGs) inside plantuml have sometimes removed their svg tag, hence it's difficult to set the correct rendering size.
- expand auto completion (suggestion) documentation by default
- add emoji example GIF and documentation
- set charset to utf-8 for each website
- refactor JSON creation inside UI Helper
