Rules for `sort` and friends

Add rules for

- [x] `sort`
- [x] `sortperm`
- [x] `sortperm!`
- [x] `sortslices` (kind of tricky because there is no easy `sortslicesperm` function)
- [x] `insorted`
- [x] `partialsort`
- [x] `partialsortperm`
- [x] `partialsortperm!`

