keymaps with "context": "Editor && selection == true"

[pbsds]

This would allow anyone to specify keymaps that are more selection dependent, rather than having to implement selection dependent behaviour into each separate action.

[
  {
    "context": "Editor",
    "bindings": {
      "ctrl-shift-i": "editor::Format"
    }
  },
  {
    "context": "Editor && selection == true",
    "bindings": {
      "ctrl-shift-i": "editor::FormatSelections"
    }
  }
]

edit:

In concert with #28020 this feature would allow you to the recreate F5 behaviour in the atom plugin "lines" as:

[
  {
    "context": "Editor",
    "bindings": {
      "f5": [
        "zed::TryActionWithFallbacks",
        [
          "zed::ActionSequence",
          "editor::SelectAll",
          "editor::SortLinesCaseSensitive",
          "editor::UndoSelection",
        ],
        "editor::UndoSelection"
      ]
    }
  },
  {
    "context": "Editor && selection == true",
    "bindings": {
      "f5": "editor::SortLinesCaseSensitive"
    }
  }
]