[RFC]: add missing double precision `nan` modules for `stats/strided`

[0PrashantYadav0]

Description

This RFC proposes to add missing double precision nan modules for stats/strided, which include :

• dnanmeankbn
• dnanmeankbn2
• dnanmeanli
• dnanmeanlipw
• dnanmeanstdev
• dnanmeanstdevpn
• dnanmeanvar
• dnanmeanvarpn
• dsnanmeanpw
• dsnanvariance
• dsnanvariancepn
• dsnanstdev
• dsnanstdevpn
• dsnanmeankbn
• dsnanmeankbn2
• dsnanmeanli
• dsnanmeanlipw
• dnansem
• dnansemch
• dnansempn
• dnansemtk
• dnansemwd
• dnansemyc
• dnanmidrangeabs
• dnancumax
• dnancumaxabs
• dnancumin
• dnancuminabs

NOTE: Priority is top to bottom.

Related Issues

None

Questions

• How many packages do we really need ? ( I have already eliminate those packages which not useful or not feasible )
• What should be the priority of all the modules mentioned here?

Other

No.

Checklist

• I have read and understood the Code of Conduct.
• Searched for existing issues and pull requests.
• The issue name begins with RFC:.

[0PrashantYadav0]

Some of the modules mention above have no implementation as of now. E.g. dsnanmeankbn, dsnanmeankbn2, dsnanmeanli, dsnanmeanlipw and more. For them I will open one more RFC to discuss about the implementation of these modules inside stats/strided package.