[RFC]: add new modules in `stats/strided`

### Description

This RFC proposes to add new modules in `stats/strided` :

- [ ] smeanstdev
- [ ] smeanstdevpn
- [ ] smeanvar
- [ ] smeanvarpn
- [ ] ssemch
- [ ] ssempn
- [ ] ssemtk
- [ ] ssemwd
- [ ] ssemyc
- [ ] svarm
- [ ] svarmpn
- [ ] svarmtk
- [ ] spcorr
- [ ] spcorrwd
- [ ] scovmatmtk
- [ ] smidrangeabs
- [ ] smskminabs
- [ ] dsstdev
- [ ] dsstdevpn
- [ ] dsvarm
- [ ] dsvarmpn
- [ ] dsvarmtk
- [ ] sdsmeanpn
- [ ] sdsmeanpw
- [ ] sdsmeanwd
- [ ] meanli
- [ ] meanlipw
- [ ] sem
- [ ] semch
- [ ] sempn
- [ ] semtk
- [ ] semwdsemyc
- [ ] varm
- [ ] varmpn
- [ ] varmtk
- [ ] pcorr
- [ ] pcorrwd
- [ ] cumax
- [ ] cumaxabs
- [ ] cumin
- [ ] cuminabs

### Related Issues

No

### Questions

No.

### Other

No.

### Checklist

- [x] I have read and understood the [Code of Conduct](https://github.com/stdlib-js/stdlib/blob/develop/CODE_OF_CONDUCT.md).
- [x] Searched for existing issues and pull requests.
- [x] The issue name begins with `RFC:`.

Start by reviewing the existing stats/strided modules and their conventions before taking on any item in the RFC list. Done would mean implementing the selected statistical module consistently with the surrounding collection, with appropriate coverage, but the issue does not name specific files or tests.

索引モデルが issue の本文から書いたものです。