Support providing a format for remote files

[roll]

Overview

Currently, the app will only successfully load a file if the format can be recognized from the URL e.g. https://raw.githubusercontent.com/frictionlessdata/frictionless-py/main/data/table.csv but it won't work for e.g. https://docs.google.com/spreadsheets/d/e/2PACX-1vQCm7ZJNhOkelSMK_Gh7MWydDFabkd2IZRHVj0jGQYCOBslXWfuBggc_w-t69xb_hs1pIHVaaCR4bHl/pub?gid=318974084&single=true&output=csv

To support custom format the Add Remote File dialog needs to have an optional format field as well (similarly as frictionless-py has --format CLI option)