Incorporate 'exchange:' property into json & create all_full_tickers.json

[awsles]

I'm wondering if you could insert the exchange into each respective amex/nyse/nasdaq json file when you create it? And/or possibly create an all_full_tickers.json which merges the three files with the respective exchange name in each entry.

In looking at https://github.com/marketplace/actions/find-and-replace (or some other search/replace), it appears this could be done in the github actions by doing a FIND on "symbol": and REPLACE with "exchange":"nasdaq", \n "symbol": By adding this property to each file, you can then create a combined file all_full_tickers.json. For example:

{
    "exchange": "nasdaq",
    "symbol": "AACG",
    "name": "ATA Creativity Global American Depositary Shares",
    "lastsale": "$1.11",
    "netchange": "0.02",
    "pctchange": "1.835%",
    "volume": "13754",
    "marketCap": "35100609.00",
    "country": "China",
    "ipoyear": "2008",
    "industry": "Other Consumer Services",
    "sector": "Real Estate",
    "url": "/market-activity/stocks/aacg"
  }