Test new notebook document change events

[jrieken]

Refs: #144662

• anyOS @rchiodo
• anyOS @joaomoreno

Complexity: 3

Create Issue

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There is a new API proposal which is about a notebook change event. The TPI is about testing this new proposal

• Create an extension using this guide
• Add the proposed API:
  • First add the proposed API to the package.json (see below)
  • Then run npx vscode-dts dev to get the typings

	"enabledApiProposals": [
		"notebookDocumentEvents"
	],

Test that

• there is doc and it makes sense
• the vscode.workspace.onDidSaveNotebookDocument-event fires whenever a notebook is saved
• the vscode.workspace.onDidChangeNotebookDocument-event fires whenever a notebook changes: this includes structural changes, like add, remove, or replace cells, as well as output and metadata changes.

[joaomoreno]

Now that's how you create a proper test item setup section! 👏

[joaomoreno]

Just found minor language doc fixes, which I found easier for me to just fix as opposed to giving you an issue for them: 22319a1