Initial Notebook UI Mode in VS Code Insiders

[TylerLeonhardt]

PR Summary

This adds Notebook mode capabilities only in:

• vscode insiders
• when the user enables the setting: powershell.notebooks.showToggleButton
• when registerNotebookContentProvider succeeds (we safely catch and log an error if it fails)

Added settings:

• powershell.notebooks.showToggleButton - shows the button at the top right that will open your file in Notebook mode
• powershell.notebooks.saveMarkdownCellsAs - new markdown cells need to either use block comments or line comments in the file. This setting determines which type of comment to use

Important notes:

• This requires checking in a vscode.proposed.d.ts file that includes the typings for Notebook APIs
• This also includes a GitHub Action that keeps that file up-to-date (it submits a PR) NOTE I NEED TO CHANGE THE BRANCH NAME WHEN WE'RE READY TO MERGE
• Notebooks only work with ps1's. We could also support psm1s, but eh.

PR Checklist

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[rjmholt]

Is this because we need a fast-release version for VSCode compat? Ideally we don't have to move off of npm (and to a repository with a deprecated signing hash algorithm) for long

[TylerLeonhardt]

It appears that the vscode-dts is to blame here. When this API is stable, we wont need this so just ignore this for now.

[rjmholt]

Is this property needed? It seems like we've declared it, so we should be able to pass this wherever we currently use this.kernel

[TylerLeonhardt]

Yes the vscode API uses it under the hood. I could potentially have 2 classes, one that implements vscode.NotebookContentProvider and one that implements vscode.NotebookKernel... but I felt one was fine, since vscode.NotebookKernel isn't that big of an interface.

[rjmholt]

Ah gotcha. This makes sense -- one of the great advantages of interfaces

[TylerLeonhardt]

Also, this originally was one interface, but they broke it up into 2 recently.

[rjmholt]

Ah gotcha. This makes sense -- one of the great advantages of interfaces

[TylerLeonhardt]

@rjmholt I've just added a couple tests :) I'll probably add more.

[TylerLeonhardt]

rip codacy who knows where you went

[TylerLeonhardt]

@rjmholt this should be ready now.