Request: Support for SEC filings module

[dmoklaf]

Originally posted by @dmoklaf in #2004

It seems a stock's SEC filings can be retrieved through the secFilingsmodule:

filings = quote._fetch(  # pylint: disable=W0212
    quote.proxy, modules=["secFilings"]
)
if filings is not None:
    filings = filings["quoteSummary"]["result"][0]["secFilings"]["filings"]
    for filing in filings:
        url = filing["edgarUrl"]
        type_ = filing["type"]
        title = filing["title"]
        timestamp = filing["epochDate"]
        date = datetime.datetime.fromtimestamp(timestamp, tz=datetime.UTC)
        symbols = filing.get("relatedTickers")
        # Do something with the filing...

Would it be possible to include this as a new feature within yfinance?