[Repo Assist] Add AsyncSeq.findIndex, tryFindIndex, findIndexAsync, tryFindIndexAsync, sortWith#261

dsyme merged 2 commits intomainfsprojects/FSharp.Control.AsyncSeq:mainfrom

repo-assist/improve-findindex-sortwith-4972099a03844b3cfsprojects/FSharp.Control.AsyncSeq:repo-assist/improve-findindex-sortwith-4972099a03844b3cCopy head branch name to clipboard