[Repo Assist] Add AsyncSeq.isEmpty, tryHead, except#264

dsyme merged 4 commits intomainfsprojects/FSharp.Control.AsyncSeq:mainfrom

repo-assist/improve-isempty-tryhead-except-2471744-646c6897389cdfcbfsprojects/FSharp.Control.AsyncSeq:repo-assist/improve-isempty-tryhead-except-2471744-646c6897389cdfcbCopy head branch name to clipboard