Is your feature request related to a problem? Please describe.
When trying out new lints, I often want to see just that lint on the problems tab so I know how many cases there would be for me to fix, and having to open the settings every time to toggle that value to false and back to the default again is annoying.

Describe the solution you'd like
Create a command for toggling dart.showTodos value programatically. So we don't have to keep opening the settings json to edit the value.

Describe alternatives you've considered
Always manually opening the settings json to edit the value for this setting.