move(group_theory/perm/cycle/*): A cycle folder (#14285)
Move:
* `group_theory.perm.cycles` → `group_theory.perm.cycle.basic`
* `group_theory.perm.cycle_type` → `group_theory.perm.cycle.type`
* `group_theory.perm.concrete_cycle` → `group_theory.perm.cycle.concrete`
