Add notebook document support

[CS-Account]

Description of Changes

This change adds support for notebooks, such as those used by Jupyter Notebooks (NotebookDocument), by utilizing onDidSaveNotebookDocument as onDidSaveTextDocument is not triggered when a notebook is saved.

References to document.fileName have been replaced with document.uri.fsPath using a Union type to support both types, as NotebookDocument does not have the equivalent fileName attribute.

This PR also includes a small update to launch.json to disable extensions during development testing.

Closes #57

Testing

This extension does not currently have a test suite, but the functionality was tested manually for both text documents and notebook documents.

Testing Steps:

• Create a notebook file and text file.
• Use an application configuration such as:

  {
  	"emeraldwalk.runonsave": {
  		"commands": [
  			{
  				// Run whenever any file is saved
  				"match": ".*",
  				"cmd": "echo '${fileBasename}' saved."
  			}
  		]
  	}
  }

• Save with both types and ensure correct output

Checklist

• [✔️] Did you update any relevant docs / samples?
• [✔️] Did you include details on how to test your changes?

[bmingles]

Thanks for the contribution. Changes look good overall. A few things

• Need to move the new Document type to the model.ts module.
• No need to version bump. This will happen as part of release
• I would suggest rebasing on latest main

[bmingles]

Looks good to me. I verified the behavior in notebook + regular file.

[bmingles]

Released in v0.2.7