[storage] migrate from JSDoc to TSDoc

[ljian3377]

https://teams.microsoft.com/l/message/19:344f6b5b36ba414daa15473942c7477b@thread.skype/1608171348573?tenantId=72f988bf-86f1-41af-91ab-2d7cd011db47&groupId=3e17dcb0-4257-4a30-b843-77f47f1d4121&parentMessageId=1608171348573&teamName=Azure%20SDK&channelName=Language%20%E2%80%93%20JS%E2%80%89%EF%BC%86%E2%80%89TS%20%F0%9F%90%B1%E2%80%8D%F0%9F%91%A4&createdTime=1608171348573

#12912

Now you can run rushx docs and you will see the generated documentation for your package under dist/docs. Hopefully, this will help us write high quality documentation for our packages and fix issues right away before them making it all the way to docs.microsoft.com. - D A

The various js tags like @type, @interface, @member, @class, @private and @constructor that are no longer useful in TS files and the different formatting for @param lines in jsdocs and the redundant inclusion of type info in @returns tag had always bothered me. Love seeing them go :) - Ramya

Address #12959 for storage.

[deyaaeldeen]

Hi @ljian3377, I already have this issue open for storage: #12956 so I am closing this one.