guard, action, internal transition, and typescript

[DrSensor]

• implement new syntax
  • [x] guard
  • [x] action
  • [x] internal transition
• [x] generate typescript declaration for xstate
• [ ] ~~compile to webassembly~~
• add bundler plugin for transforming scdlang into xstate
  • [ ] add webpack-loader
  • [ ] add rollup-plugin

[github-actions[bot]]

[DrSensor]

Todo:

• [x] utilize strum for defining custom config
• [x] use opaque type FromStr on Build trait
• [ ] migrate .github/main.workflow to the new YAML format
• precise syntax highlighting:
  • [x] create .tmLanguage grammar file
  • [x] convert that into .packdump file using syntect_server
  • [ ] add scdlang-vscode as git-submodule
  • [ ] make PR in prettyprint crate to expose syntect::dumps::from_binary