Feature: stock market service and info widget (#3617)

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

docs/widgets/info/stocks.md

@@ -0,0 +1,48 @@
+---
+title: Stocks
+description: Stocks Information Widget Configuration
+---
+
+_(Find the Stocks service widget [here](../services/stocks.md))_
+
+The Stocks Information Widget allows you to include basic stock market data in
+your Homepage header. The widget includes the current price of a stock, and the
+change in price for the day.
+
+Finnhub.io is currently the only supported provider for the stocks widget.
+You can sign up for a free api key at [finnhub.io](https://finnhub.io).
+You are encouraged to read finnhub.io's
+[terms of service/privacy policy](https://finnhub.io/terms-of-service) before
+signing up. The documentation for the endpoint that is utilized can be viewed
+[here](https://finnhub.io/docs/api/quote).
+
+You must set `finnhub` as a provider in your `settings.yaml` like below:
+
+```yaml
+providers:
+  finnhub: yourfinnhubapikeyhere
+```
+
+Next, configure the stocks widget in your `widgets.yaml`:
+
+The information widget allows for up to 8 items in the watchlist.
+
+```yaml
+- stocks:
+    provider: finnhub
+    color: true # optional, defaults to true
+    cache: 1 # optional, default caches results for 1 minute
+    watchlist:
+      - GME
+      - AMC
+      - NVDA
+      - AMD
+      - TSM
+      - MSFT
+      - AAPL
+      - BRK.A
+```
+
+The above configuration would result in something like this:
+
+![Example of Stocks Widget](../../assets/widget_stocks_demo.png)

docs/widgets/services/stocks.md

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+---
+title: Stocks
+description: Stocks Service Widget Configuration
+---
+
+_(Find the Stocks information widget [here](../info/stocks.md))_
+
+The widget includes:
+
+- US stock market status
+- Current price of provided stock symbol
+- Change in price of stock symbol for the day.
+
+Finnhub.io is currently the only supported provider for the stocks widget.
+You can sign up for a free api key at [finnhub.io](https://finnhub.io).
+You are encouraged to read finnhub.io's
+[terms of service/privacy policy](https://finnhub.io/terms-of-service) before
+signing up.
+
+Allowed fields: no configurable fields for this widget.
+
+You must set `finnhub` as a provider in your `settings.yaml`:
+
+```yaml
+providers:
+  finnhub: yourfinnhubapikeyhere
+```
+
+Next, configure the stocks widget in your `services.yaml`:
+
+The service widget allows for up to 28 items in the watchlist. You may get rate
+limited if using the information and service widgets together.
+
+```yaml
+widget:
+  type: stocks
+  provider: finnhub
+  showUSMarketStatus: true # optional, defaults to true
+  watchlist:
+    - GME
+    - AMC
+    - NVDA
+    - TSM
+    - BRK.A
+    - TSLA
+    - AAPL
+    - MSFT
+    - AMZN
+    - BRK.B
+```