Use marshmallow to validate data inputs for project creation API

[ykevu]

As I'm scoping out zarr compatibility, I had the thought that it would likely be very useful to use marshmallow or pydantic for data validation for our API. I imagine this can give more useful error messages, better organization and clarity for development and users, and no more loading into white screens. I don't have too much experience with this though, so I (and/or Shenyi assuming this carries over) might appreciate some help from @msschwartz21 or @rossbar if you have experience!