Roslyn analyzers quickfix: Add option for Suppress / Suppressions

[LMSSonos]

Environment data

dotnet --info output: 5.0.203
.NET SDK (reflecting any global.json):
Version: 5.0.203
Commit: 383637d63f

Runtime Environment:
OS Name: Windows
OS Version: 10.0.19042
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\5.0.203\

VS Code version: 1.56.2
C# Extension version: 1.23.12

Steps to reproduce

I think this is more a feature request than a bug. I
Type some code that the roslyn analyzer shows the issue and the quickfix bulband shows the quickfix (ctrl+.)

Expected behavior

Show option for suppression (as in visual studio) by pressing (ctrl+.) or clicking the bulb

Actual behavior

Shows only quickfix options to fix the code, but no suppression option.

[fgimian]

Yes please! And this should apply to all analyzers which are installed similar to Visual Studio. Having the ability to suppress at different levels would also be awesome (similar to Visual Studio). 😄

[mavasani]

@Cosifne Where are we with support for nested actions? If that is still far away, we should consider adding back the 3 Suppression related actions (pragma/local SuppressMessageAttribute/global SuppressMessageAttribute), and keep the longer set of Configuration related actions hidden.

[Cosifne]

I haven't heard any progress within the VSCode.
After checking with @akhera99 she mentioned the recommended way would be https://code.visualstudio.com/api/ux-guidelines/quick-picks to use that.
I will check if it is possible to extend that in the language client

[Cosifne]

Looks like it is possible.
We can register a call back in the client middleware so it will handle all the code action. https://github.com/microsoft/vscode-languageserver-node/blob/f2ff7d55464a1f58f978cb6635bd8865f050553c/client/src/common/codeAction.ts#L113
For normal code action, forward it to the client.
For nested code actions, call window.ShowQuickPick(), nested as deep as we want. (Title/description might need to be modified a little to get things fit)

[Cosifne]

Maybe it would be best to prototype this and see if it is possible, I might not have time this week, can work on this next week