Add catagory to `cts.json`

[He-Pin]

{
      "name": "whitespace, functions, spaces in an absolute singular selector",
      "category": "filter",
      "selector": "$..[?length(@)==length($ [0] .a)]",
      "document": [
        {
          "a": "foo"
        },
        {}
      ],
      "result": [
        "foo"
      ]
    }

Would be helpful for testing dedicated group

[gregsdennis]

I think maybe have it be an array. Some tests may fall into multiple categories.

Would you like to submit a PR?

[gregsdennis]

Maybe it could be called tags. I think the one you showed would have ["filter", "equals", "function", "length"] since it involves all of those things.

I'm not sure how detailed we want to be. It also has a recursive descent.

[He-Pin]

Sorry, I would like to , but under stress at work :(, I can fire a PR If I find time.