F_API download_stock_list - US and Canada only and other fulder

[gp1981]

Enhance download_stock_list by using the information to filter only US and Canada companies. Example of json response from the function download_stock_list is
[ { "symbol": "KZMS.ME", "name": "The Open Joint Stock Company Krasnokamsk Metal Mesh Works", "price": 226, "exchange": "MCX", "exchangeShortName": "MCX", "type": "stock" }, { "symbol": "KMMXX", "name": "DWS Money Market Prime Series - DWS Money Market Fund", "price": 1, "exchange": "Nasdaq", "exchangeShortName": "NASDAQ", "type": "trust" [...]`

Also companies that are trust can be filtered.