[Feature request] VSCode extension - Optionally lint opened files only

[o-l-a-v]

Environment

• VSCode v1.129.1
• ryl extension v0.2.0

Context

Currently, ryl lints and lists problems of ALL YAML files in a workspace, and does not care if a file is open in the editor or not.

• It gets noisy.
• That's not how many other VSCode linter extensions does it.
  • rumdl, vscode-powershell and more. No other linter adds to the VSCode "problems" tab in above screenshot.

However, I see that this behavior could be useful for some.

Feature request

Add a VSCode .vscode/settings.json setting to only care for YAML files that are open in the editor.