Add new storage features introduced in LW7 updates

[dshukertjr]

Feature request

Hi there,

There has been some features added to our storage, and we made some changes to the js client library to be able to use those features. It would be great if these could be added to this client library as well!

• feat: custom file size limit and mime types at bucket level storage-js#151 file size and mime type limits per bucket
• feat: added methods for signed-url upload storage-js#152 signed url for uploads
• feat: quality option, image transformation storage-js#145 quality option for image transformations
• feat: format option for webp support storage-js#142 format option for image transformation

[anand2312]

Feature 3 and 4 on the list were included in #105
Thanks for the issue!