* Move finnhub to a stocks folder
As I am preparing an other stocks data provider, let's move `finnhub` to
a stocks folder that will host the others providers.
* Use go-pretty v6
Will be used by the new stock provider module, so let's just upgrade
this one to reduce the number of dependencies.
* Add Yahoo Finance module
Yahoo Finance provides an API for which `piquette/finance-go` is a
powerful client. This new module leverages this module to integrate all
indices provided by Yahoo Finance (international stocks, crypto,
options, currencies...)
Sample config:
```yaml
yfinance:
title: "Stocks 🚀"
symbols:
- "MSFT"
- "GC=F"
- "ORA.PA"
sort: true
enabled: true
refreshInterval: 60
position:
top: 1
left: 0
height: 1
width: 1
```