Support overwritten SQL-Formatter editor options from .sql-formatterrc file in workspace root

Add in root of the workingdirectory a file name .sql-formatterrc to overwrite editor options (such us prettier): 

```json
{
  "sql-formatter.dialect" : "sql"
  "sql-formatter.uppercase": true
  "sql-formatter.linesBetweenQueries" : 2
}
```

It will be awesome to switch from projects with different format rules very quickly. 😄 