DFDL language. Initial omega-edit client integration:

DFDL language. Initial omega-edit client integration:

- Created DFDL language extension, to be used to replace the snippets
- Initial implementation of omega-edit client
  - By default it is hidden
  - Prompt for file to edit. In the future once it is to replace the hex view it will auto open the data file instead of prompting
  - Downloads Scala server from release pacakges then runs it
  - Will prompt if you want to stop the omega_edit server once you exit out of the webview
  - Supported functions:
    - Insert
    - Delete
    - Overwrite (workaround method, going to make an issue for making this function call the Scala server once the bug is worked out over there)
    - Undo (workaround method, issue will be made to update code to call Scala server once the undo method is fully implemented in the server)
    - Redo  (workaround method, issue will be made to update code to call Scala server once the undo method is fully implemented in the server)
    - Copy & Paste
    - Save Session
  - undo/redo will be updated later to use the Scala implementation once it is complete

Closes #127
Closes #128
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Closes #126