FEATURE: Make `group` a quick

[codereport]

To do:

• [x] group quick
• [x] make all tests work
• [x] make lc392p1 work: https://leetcode.com/problems/longest-strictly-increasing-or-strictly-decreasing-subarray/description/
  • sum group should be green & blue

[codereport]

Jellyfish change that enabled this: https://github.com/codereport/jellyfish/commit/96a790bbf26afec1b84406fa92cc152073f8e170